Baron Killyleagh
It was created on 23 July 1986 by Queen Elizabeth II as a substantive title for her son Prince Andrew , Duke of York , for the occasion of his marriage to Sarah Ferguson . 
<triplet> Queen Elizabeth II <subj> Prince Andrew, Duke of York <obj> child <triplet> Prince Andrew, Duke of York <subj> Queen Elizabeth II <obj> mother <subj> Sarah Ferguson <obj> spouse <triplet> his marriage <subj> 23 July 1986 <obj> point in time <subj> Prince Andrew, Duke of York <obj> participant <subj> Sarah Ferguson <obj> participant <triplet> Sarah Ferguson <subj> Prince Andrew, Duke of York <obj> spouse