What does Osa mean?
Osa \o-sa\ as a name for girls. Usage of Osa is American, and the name used to be fashionable as a transferred use of the surname. Osa has however become somewhat old-fashioned and is no longer that frequently used in the present day as a first name for newborn baby girls in the U.S..
Osa is a rare given name for females but a somewhat popular last name for all people (#81700 out of 150436, Top 54%). (2000 U.S. Census)
Charted below is the birth name popularity of Osa for girls. Osa reached its highest position of #809 in the U.S. then, but is not found in the list currently. (2014 Birth Statistics)