one's next of kin

(one's) next of kin

One's closest living relative. Now that the body has been identified, we'll have to notify his next of kin of his death. The will specifies that her next of kin will be entitled to her entire estate.
See also: kin, next, of

one's next of kin

one's closest living relative or relatives. The police notified the dead man's next of kin. My next of kin lives 800 miles away.
See also: kin, next, of