surname Kong
Depicts an opening in a child's (子) head, representing the fontanel. Based on the original meaning "fontanel". The meaning of this character has shifted over time and now means "hole" and "opening".
《說文》：“孔，通也。从乙，从子。乙，請子之候鳥也。乙至而得子，嘉美之也。古人名嘉，字子孔。”
fontanel