Meaning and name origin
There is 1 masculine form of Lou: Louis.
Lou is a very popular first name for females (#604 out of 4276, Top 14%) and also a very popular surname or last name for all people (#19078 out of 88799, Top 21%) (2000 U.S. Census).
Displayed below is the baby name popularity of the name Lou for girls. Lou reached its highest rank of #157 in the U.S. in 1880-1889. (2014 statistics).
Displayed below is a comparison of the popularity of the girl name Lou and its variant forms. Popular variation forms ranked in the Top 1000/100 are Lucy (#62), Luana, Luella, Lu, Louise, Louann, Louella and Lou. (2014 statistics).