原Barry Allen (the second Flash) and his grandson Bart Allen (Impulse/the second Kid Flash/the fourth Flash) are both DC comics superheroes. They share the full name Bartholomew Henry Allen. The Flash comics also include other members of the Allen family.
原Allen also means precious (Gaelic, Old German), handsome, little rock (Breton), fair (Scottish), harmony (Celtic), noble (Celtic, early Irish), cheerful, shy, sensitive towards others, sentimental, brave, and spirited.
原I thought I would leave a personal impression. Okay. I think that the name Allen is more of a middle name. Which is good because it goes with EVERY first name imaginable. Try it. Pick a first name and then add Allen. It works I PROMISE. I am absolutely going to name one of my sons Allen.