User blog comment:Zathronas/Speculative author: Who is Summer Rose?/@comment-5217560-20140809062848/@comment-96.254.157.84-20140809233908

Ozpin - decades older than any of the cast

Glynda and Cinder - around the same age

Qrow - speculated to be on the same team as Ironwood and a Dorthy character, meaning he's older than Summer.