Lou \lou\ as a girl's name (also used as boy's name Lou). Short form of Louann. Often used in blends such as Louann, Mary Lou, Louella.
Lou has 5 variant forms: Louanna, Louanne, Louella, Lu and Loulou.
For more information, see also related names Luana, Louise, Lucy and Luella.
Baby names that sound like Lou are Lee, Lois, La-, Lia and Lea.