The name Haddie is a girl's name . Haddie.
From the experts:
While this version of the name has never made it into the US Top 1000, it is nonetheless slowly on the rise. In 2015, 162 girls were given this name. The related Hattie is the highest it's ever been, currently at Number 488. This spelling could also supply an accessible nickname to the rising Jewish appellation Hadassah.