Around the world, Thomassian (Thomassian 
) is an extremely rare unknown gender first name. Much more prevalently, Thomassian is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Thomassian | Lebanon, Australia, United States, Canada, France |
Mr, Haik, Haig, Ofik, Maria, Marie, Magda, Megan, Sabah, Shant, Sirui, Serge, Sonia, Sossy, Aline, Andre, Anais, Angil, Armen, Arlen, Chris, Berge, Enzo, Eric, Troy, Jill, Ty, Ara, Roy, Dan, Guy, Lia, Tom, Mike, Sosi, Sose, Brian, Ally, Paul, Rose, Remy, Rita, Ruth, Dick, Leon, Lois, John, Jean, Ayla, and Karin