August as a girl name?

Avionna Marie`s mommy👣 💜👣 • livin that mommy and wife life! hubby and I have three babies. one son and two girls. expecting our third baby girl August 14th.
I want to name my baby August if it's a boy but my hubby wants him to be Michael Jr. I really love the name August though. My hubby said if it's a girl I can name her but Ive never heard of this name for a girl. What do you guys think?