your 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
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

your ˌnext of ˈkin

(formal) your closest living relative or relatives: The hospital need to contact her next of kin — she is very ill indeed.This form must be signed by your next of kin.
Kin is an old word for your family or your relatives.
See also: kin, next, of
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
This is to acknowledge the receipt of the information's your next of kin haveprovided to us and to re-confirm from you,if truly you are the person that sentyour next of kin to pay your transfer fee on your behalf since you have beenhospitalized.Be aware that will accept what ever he issue to us as evidence if wedo not hear from you withing the next 2 working days.We await your urgent response.
In fact, email services owned by Internet giants like Google and Microsoft have a policy of keeping your data after you die and letting your next of kin or the executor of your estate access it.hese services can hold tens of thousands of messages.
Questions about your next of kin clearly upset you.
Don't let questions about your next of kin, or anything else that's personal, damage your self-esteem.
We now have family structures that are not only different but unique, so that your next of kin might bear little relationship to anyone else's.
Your ex-partner is not legally your next of kin and so would have no entitlement or responsibility to deal with your affairs, nor would she be liable for your debt.
Please ask a friend ahead of using them as your next of kin, I'm sure they'd be pleased to help if needed.