Forrest Carter, in his book the Education of Little Tree set around the great depression he relays the story of a grandfather’s explanation to his grandson his use of the phrase “I kin you”. It meant to love and understand.
“Grandpa said back before his time ‘kinfolk’ meant any folks that you understood and had an understanding with, so it meant ‘loved folks.’ but people got selfish and brought it down to mean just blood relations; but that actually it was never meant to mean that.”