“King. But now, my cousin Hamlet, and my son” -
“A little more than kin, and less than kind.” Shakespeare:
Hamlet, i. 2.
or kinsman is a relative by marriage or blood more distant than
father and son. Kind means of the same sort of genus, as
man-kind or man-genus.
Hamlet says he is more than kin to Claudius (as he was
step-son), but still he is not of the same kind, the same
class. He is not a bird of the same feather as the king.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894