Family name Мордехай (Mordecai 
, Mordechai 
, Mordekhai 
, along with others...) , across the world, is quite a rare last name. The last name Мордехай is habitual in Israel, where it is quite a common surname, Hungary, where it is quite a rare surname, and Jamaica. Measured by absolute frequency, it most frequently occurs in the United States, Israel, and Nigeria. Likewise, Мордехай is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mordecai | Kenya, United States, Israel, Ghana, Nigeria |
| Mordechai | United States, Israel, Ghana, United Kingdom, Nigeria |
| Mordekhai | France, United States, Israel, Belgium, Indonesia |
| Mordechaj | Germany, France, Poland, United States, Israel |
| Mordehay | Germany, France, Brazil, United States, Israel |
| Mordehai | Hungary, Colombia, United Kingdom, United States, Israel |
| Мордехай | Kazakhstan, Russia, Ukraine, Belarus |
| Mordekhay | Canada, Chile, United States, Israel, Mexico |