Why Angel is abrred from ever naming another character David

[valarltd]

Names:

Most common
Chris-4
David/Dave-6
John/Johnny-3
Mike/Michael/Michelino-4
Nick-3
Robin-3 (Two of these are Robin Hood, should it count as 2 or 3?)
Thomas/Tom-3
William/Will-4

Ordinary today:
Anthony
Benjamin
Billy
Chad
Charlie/Charles/Chuck-2
Dan
Gabriel
Glenn
Jace/Jason
James
Jeff
Josh
Ken
Matt
Paul-2
Rick
Sam
Sean-2
Shane
Steven
Taylor
Victor
Zach

Ordinary for their era
Adrien
Al
Amos
Apollo
Cliff
Edward
Frank
Henry
Iakobos
Jacob
Jake
Lou
Marion
Nathaniel
Nigel
Phillip
Ulysses

Unusual/Fantasy:
Adlai
Ariel
Arqam
Conlan
Corban
Damian
Etarin
Herm
Iain
Jared
Jarett
Meriwether
Mishael
Pelton
Rafael
Rakesh
Ren
Ruvane
Samir
Seven
Sterling
Val
Zephyros