Cognomen Isosaari (Isosaari 
) , in all the world, is a rare surname. The family name Isosaari is habitual in Northern Europe, particularly Finland, where it is quite a rare surname, Estonia, where it is a rare surname, and Norway, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Finland, Norway, and Canada.
| VARIANT | COUNTRY |
|---|---|
| Isosaari | Estonia, Canada, Norway, Finland, United States |
| jussi isosaari Finnish professor, FI (b. 1916) |
|
|
| maija isosaari Finnish entrepreneur, business executive and CEO, FI (b. 1920) |
|
|
| kaija isosaari FI (b. 1923) |
|
|
| gunnar isosaari Finnish association football player, FI (b. 1949) |
|
|
| jouko isosaari FI |
|
|
| jaakko isosaari |
|
Mr, Janne, Jouko, Jenny, Julia, Jussi, Taina, Tommi, Lotta, Heidi, Iikka, Markus, Matias, Aleksi, Päivi, Robert, Janice, Ilari, Raija, Pihla, Pirjo, Ms, Pã, Mika, Saku, Anne, Aija, Aaro, Jani, Jari, Juha, Eeva, Inka, Maija, Minna, Miika, Sanna, Katja, Leevi Onni, and Iiro Juhani