What is the Daitch-Mokotoff (D-M) Soundex Coding?
The Daitch-Mokotoff Soundex System was created by Randy Daitch and Gary Mokotoff of the Jewish Genealogical Society because they concluded the system developed by Robert Russell in 1918, and in use today by the U.S. National Archives and Records Administration (NARA) does not apply well to many Slavic and Yiddish surnames. It also some includes refinements that are independent of ethnic considerations.