The name Sommer is a girl's name . Sommer and discussed in our forums with posts like "Love, Like, Lose -- Outlandish/Guilty Pleasures edition!".
From the experts:
You occasionally see the German and Danish word for "summer" pop up as a first name -- 16 girls were given it in 2016 -- and that trend may continue, now that the original has risen to Number 202 on the American popularity list.