Aaron
Melchizedek
Melchizedek is not often mentioned in the Bible. All that can be surmised is that he was a priest and the king of Salem.
Paul is first mentioned in the bible in the book of Acts.
Love is mentioned in the first book of the Bible - Genesis.
In the Bible, Aaron, the high priest, is described as wearing a gold earring. This is mentioned in the book of Exodus where it signifies his position and role as the high priest.
There is no book called "Eli" in the Bible. But the priest Eli was mentioned in 1 Samuel and 2 Samuel.
The first book in the Bible was Exodus. The first Name mentioned in the Bible was Adam.
Adam and Eve were the first humans according to the bible, so they would logically be the first grandparents mentioned there.
Adam
It is not mentioned in the bible.
that would be Jesus Christ AS heavenly high priest. Hebrews (9:25,5:5,3:1) also unnamed ones are mentioned at revelation chptr. 20 verse 6