キョウ, ク, クウ, グ, そな.える, とも, ども
submit, offer, present, serve (meal), accompany
JLPT3 G6 S8 F313
As per 共# (act jointly in making an offering): *offer*; *serve* → *attendant*; *retinue*; *plural/humble suffix*. Here, 人 has no semantic function, being used simply to create a derivative character conveying meanings that dropped from the original one.
[Full Kanji Etymology List]