猿公 is read as えてこう (etekou) and means monkey.
えてこう
etekou
さる
bathhouse prostitute
えんじん
ape man
さるがくのう
noh
さるもきからおちる
even monkeys fall from trees
さるどし
year of the Monkey
さるで
ape hand (deformity)
さるたひこのみこと
Saruta Hiko no Mikoto (Shintō god)
ましこ
monkey
さるまわし
showman who trains performing monkeys
さるもく
primates
さるやま
artificial mountain in a monkey enclosure (at a zoo, etc.)
ましこどり
rosefinch