Tools - Hand Drawn Icons by Good Stuff, No Nonsense on Creative Market
Vectorial Animals on Behance
Third from bottom, fourth from left Tree silhouettes vector 156485 - by dylandog on VectorStock®:
nautical tattoo ideas - Google Search
Morse Code would be cool to do initials for a tattoo. Like this for dad maybe ?
Image result for arrow tattoo morse code
Put away the fingers, cowboy. Your beard was already made that point.