next of kin 
noun [treated as singular or plural]
A person’s closest living relative or relatives: the police notified the next of kin...
- The driver's name was being withheld until police could notify next of kin.
- People worried about who would be notified as their next of kin in case of medical emergency are being urged to carry a new card to avoid confusion.
- He said next of kin would be notified before the man's identity was released.
Synonyms
closest relative, closest relation, nearest blood relation/relative, closest family member
- immune body
- immune cell
- immune complex
- immune deficiency
- immune globulin
- immune-mediated
- immune response
- immune serum
- immune system
- immunifacient
- immunisation
- immunise
- immunist
- immunity
- immunization
- immunize
- immunizer
- immuno-
- immunoassay
- immunobiologic
- immunobiological
- immunobiology
- immunoblot
- immunoblotted
- immunoblotting