Surname היית'ם (Hayssam 
, היית'ם 
) , in the entire world, is a rare family name. The cognomen היית'ם is habitual in Lebanon, where it is quite a rare surname, Kuwait, where it is a rare surname, and Egypt. More prevalently, היית'ם is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hayssam | Saudi Arabia, United Arab Emirates, Syria, Egypt, Lebanon |
| היית'ם | Israel |