The name Cullen is a boy's name of Irish origin meaning "holly tree". Cullen is ranked #517 on our popularity charts and is often added to lists like Tree Baby Names and discussed in our forums with posts like "2nd Small British Primary School".
From the experts:
Cullen is an appealing Irish surname name that upped its cool factor considerably when it became the Twilight family name of Edward et al. It's considerably less popular than it was at its peak in 2010, but is still widely used.
Cullen Jenkins was a defensive tackle for the Green Bay Packers and Philadelphia Eagles.