Quote:
-kin
-kin means "a kin, kind, race, species, family":
Mankin "mankind", wifekin "womankind", Anglekin "the English kin", Walkin "The Welsh kin" deerkin "species of animal", fowlkin "a race of birds", fishkin "species of fish", flykin "species of fly", seedkin "a kind of seed", bookkin "a kind of book", ernkin "a kin of eagles", reedkin "kind of reed", wheatkin "kind of wheat", neatenkin "kind of animals", fivelkin "race of seamonsters", treekin "species of tree", orfkin "cattle", peasekin "kind of pease", ravenkin "a kin of ravens", hawkkin "a kin of hawks", wilderkin "species of wild beasts", wormkin "species of snake", meatkin "kind of food", nadderkin "species of snake", entkin "the race of giants", weaponedkin "the male sex", werekin "mankind", gomekin "mankind", wortkin "species of plant", applekin "kind of apple".
These are largely poetic terms. Some are from Middle English, but most witness a form of word-building that was already out of fashion. Certainly so when modern surnames were coined.