Meaning and Name Origin
Osa \o-sa\ as a name for girls. Usage of Osa is American, and the name used to be fashionable. Osa has however become somewhat old-fashioned and is no longer that frequently used in the present day as a given name for newborn baby girls in the U.S..
Osa is a rare given name for females. Osa is an equivalently rare last name too for all people. (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. (Top 1000 Baby Names Records, 2014)