1
general::
Phrase(s): kith and kin
friends and relatives; people known to someone. • I was delighted to find all my kith and kin waiting for me at the airport to welcome me home. • I sent cards to my kith and kin, telling them of my arrival.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Friends and family, as in Everyone was invited, kith and kin as well as distant acquaintances. This expression dates from the 1300s and originally meant "countrymen" (kith meant "one's native land") and "family members." It gradually took on the present looser sense.
American Heritage Idioms