They were distant relatives. Both were in the line of Abraham, so would have been distantly related to each other.
Elihu was the son of Bar′a·chel the Buz′ite, a descendant of Abraham's nephew, Buz (Job 32:2, 6; Genesis 22:20, 21).
Job was a relative of Abraham, both being descendants of Shem, who was the 'father' of the Semitic peoples: the Elamites, the Assyrians, the early Chaldeans, the Hebrews, the Aramaeans (or Syrians), various Arabian tribes, that lived principally in the southwestern corner of the Asiatic continent, throughout most of the Fertile Crescent and the Arabian Peninsula.
(Genesis 10:21, 22, 30)
Looking at it scripturally, of course, every human on earth is 'related'. We all come from one source, Adam and Eve. After the flood, the human family descended through Noah's sons Shem, Ham and Japheth.
So, yes, Job and Elihu were distantly related.
Elihu
That is one of their jobs. They have to notify all the beneficiaries.
Elihu Embree died in 1820.
Elihu Burritt was born in 1811.
Elihu Vedder died in 1923.
Elihu Vedder was born in 1836.
Elihu Spencer was born in 1721.
Elihu Spencer died in 1784.
Elihu Palmer died in 1806.
Elihu Katz was born in 1926.
Elihu Grant was born in 1873.
Elihu Grant died in 1942.