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We search millions of historical and current public records to identify people with Jewish ancestry.

Each contact's Jewish probability is calculated based on his/her name.

We only include contacts with 5% Jewish probability or higher in our data.

Type in a name below to see how our system works:

For more details click here

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  • Duplicate entries
  • Wrong addresses
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We search millions of historical and current public records to identify people with Jewish ancestry.

Each contact's Jewish probability is calculated based on his/her name.

Type in a name below to see how our system works:

We only include contacts with at least 5% Jewish probability in our data based on the Pew Research Study that found about 1% of the American population is halachically Jewish*. This means all our contacts are at least five times as likely to be Jewish than the average American.

We calculate Jewish probability using the contact's first and last name based on the statistical analysis of over 87 million immigration records.

When immigrants came to America they had to specify their name and "Race or people" as shown on the immigration document below.

We analyzed over 87 million immigration records from New York Ports between 1820 and 1957 (sources below) for:

  • Common Jewish first/last Names
  • # of Immigrants with each first/last name
  • # of Immigrants with race as "Hebrew", "Jewish" for each first/last name
  • # of Immigrants with race as "Israeli" or "Israelian" for each first/last name

We assumed all those with race as "Hebrew" or "Jewish" were Jewish and 80% of those with race as "Israeli" or "Israelian" were Jewish (based on Israeli census data between 1948 and 1957)

After compiling data on over 15,000 common Jewish first/last names we did statistical analysis to compute the probability of any first/last name combination being Jewish.

Results of our linear regression using least-squares estimation had a significance of 5.93E-14 (F signficance value) with P-values for "First Name Jewish Probability" and "Last Name Jewish Probability" coefficients both < 0.00001 showing high significance.

To our knowledge this is the most in-depth analysis of Jewish name probability available.

E-mail info@mivtzoim.net if you want more details on our study.

Data Sources

Passenger Lists of Vessels Arriving at New York, New York, 1820-1897. Microfilm Publication M237, 675 rolls. Records of the U.S. Customs Service, Record Group 36. National Archives at Washington, D.C.

Passenger and Crew Lists of Vessels Arriving at New York, New York, 1897-1957. Microfilm Publication T715, 8892 rolls. Records of the Immigration and Naturalization Service; National Archives at Washington, D.C.

Supplemental Manifests of Alien Passengers and Crew Members Who Arrived on Vessels at New York, New York, Who Were Inspected for Admission, and Related Index, compiled 1887-1952. Microfilm Publication A3461, 21 rolls. ARC ID: 3887372. RG 85, Records of the Immigration and Naturalization Service, 1787-2004; Records of the Immigration and Naturalization Service; National Archives, Washington, D.C.

Index to Alien Crewmen Who Were Discharged or Who Deserted at New York, New York, May 1917-Nov. 1957. Microfilm Publication A3417. ARC ID: 4497925. National Archives at Washington, D.C.

Passenger Lists, 1962-1972, and Crew Lists, 1943-1972, of Vessels Arriving at Oswego, New York. Microfilm Publication A3426. ARC ID: 4441521. National Archives at Washington, D.C.

We compile data from public sources including property tax and business registration records.

For example for NYC data we use extract data from ACRIS and NYC.gov

We have been thinking about security from day 1.

We know that if our data falls into the wrong hands it could have not good consequences Chas V’Shalom.

Here are some measures we take to make sure this doesn't happen:

  • We don't post real data on our public website.

    You will notice that the sample contains totally random data

  • We screen all registrants

    When someone signs up we first call or email them to make sure they are a frum person honestly interested in doing Mivtzoim.

    We don’t give data out to non-frum users even if they will pay us lots of money.

  • We use industry standard encryption

    You will notice on any data page the URL has "https" which means it uses a secure connection. We use 2048 bit Industry Standard SSL Certificate - the same level of security used by top companies.

In areas we already have data (e.x. Chicago, IL) the cost is between $0.05 and $0.25 per record depending on your needs.

In areas we do not have data we charge a fixed fee to extract all the Jewish contacts in your location which is usually between $250 to $750 depending on the location.

After you sign up we will look into your location and give you an estimate.

How we find Jews

We search millions of historical and current public records to identify people with Jewish ancestry.

Each contact's Jewish probability is calculated based on his/her name.

Type in a name below to see how our system works:

We only include contacts with at least 5% Jewish probability in our data based on the Pew Research Study that found about 1% of the American population is halachically Jewish*. This means all our contacts are at five times as likely to be Jewish than the average American.

We calculate Jewish probability using the contact's first and last name based on the statistical analysis of over 87 million immigration records.

When immigrants came to America they had to specify their name and "Race or people" as shown on the immigration document below.

We analyzed over 87 million immigration records from New York Ports between 1820 and 1957 (sources below) for:

  • Common Jewish first/last Names
  • # of Immigrants with each first/last name
  • # of Immigrants with race as "Hebrew", "Jewish" for each first/last name
  • # of Immigrants with race as "Israeli" or "Israelian" for each first/last name

We assumed all those with race as "Hebrew" or "Jewish" were Jewish and 80% of those with race as "Israeli" or "Israelian" were Jewish (based on Israeli census data between 1948 and 1957)

After compiling data on over 15,000 common Jewish first/last names we did statistical analysis to compute the probability of any first/last name combination being Jewish.

Results of our linear regression using least-squares estimation had a significance of 5.93E-14 (F signficance value) with P-values for "First Name Jewish Probability" and "Last Name Jewish Probability" coefficients both < 0.00001 showing high significance.

To our knowledge this is the most in-depth analysis of Jewish name probability available.

E-mail info@mivtzoim.net if you want more details on our study.

Data Sources

Passenger Lists of Vessels Arriving at New York, New York, 1820-1897. Microfilm Publication M237, 675 rolls. Records of the U.S. Customs Service, Record Group 36. National Archives at Washington, D.C.

Passenger and Crew Lists of Vessels Arriving at New York, New York, 1897-1957. Microfilm Publication T715, 8892 rolls. Records of the Immigration and Naturalization Service; National Archives at Washington, D.C.

Supplemental Manifests of Alien Passengers and Crew Members Who Arrived on Vessels at New York, New York, Who Were Inspected for Admission, and Related Index, compiled 1887-1952. Microfilm Publication A3461, 21 rolls. ARC ID: 3887372. RG 85, Records of the Immigration and Naturalization Service, 1787-2004; Records of the Immigration and Naturalization Service; National Archives, Washington, D.C.

Index to Alien Crewmen Who Were Discharged or Who Deserted at New York, New York, May 1917-Nov. 1957. Microfilm Publication A3417. ARC ID: 4497925. National Archives at Washington, D.C.

Passenger Lists, 1962-1972, and Crew Lists, 1943-1972, of Vessels Arriving at Oswego, New York. Microfilm Publication A3426. ARC ID: 4441521. National Archives at Washington, D.C.

*The Pew Study considered as Jewish "anyone who described themselves as Jewish or partially Jewish by religion, to anyone who identified themselves as Jewish or partially Jewish aside from religion, and to anyone who was raised Jewish or partially Jewish or had a Jewish parent – even if they do not think of themselves as Jewish." Their total population estimate for Jews in America based on these criteria was 5.3 million - about 2.2% of the US Adult population in 2013. They reported the intermarriage rate was about 50% so we assumed about half of those they considered Jewish were halachically Jewish i.e. 1% of the American population. Therefore in our data we consider include all contacts with 5% Jewish probability greater which means all our contacts are at least five times as likely to be Jewish than the average American.

Our Data Sources

We compiled historical data from government archives (more details).

We get current data from public sources including property tax and business registration records.

For example for NYC data we use extract data from ACRIS and NYC.gov

Security

We have been thinking about security from day 1.

We know that if our data falls into the wrong hands it could have not good consequences Chas V’Shalom.

Here are some measures we take to make sure this doesn't happen:

  • We don't post real data on our public website.

    You will notice that the sample contains totally random data

  • We screen all registrants

    When someone signs up we first call or email them to make sure they are a frum person honestly interested in doing Mivtzoim.

    We don’t give data out to non-frum users even if they will pay us lots of money.

  • We use industry standard encryption

    You will notice on any data page the URL has "https" which means it uses a secure connection. We use 2048 bit Industry Standard SSL Certificate - the same level of security used by top companies.

Cost

In areas we already have data (e.x. Chicago, IL) the cost is between $0.05 and $0.25 per record depending on your needs.

In areas we do not have data we charge a fixed fee to extract all the Jewish contacts in your location which is usually between $250 to $750 depending on the location.

After you sign up we will look into your location and give you an estimate.