That would be Abraham. He is the father of Isaac and Ishmael through which the Jews and the Arabs derive ancestry.
I think you will find that every biblical character is real. Scholars doubted the existence of David and pilot and many others for years until we got stones and tablets that confirmed their existence.
The top-10 archaeological discoveries related to Moses and the Exodus that affirm the Bible are presented by ABR staff writer and researcher, Bryan Windle
biblearchaeology.org
I know you want "Moses was here" on a wall but you won't get that. There is to be pillars that marked the crossing of the Red Sea.
Supposedly built by Solomon.
Visit the post for more.
redseaexodus.wordpress.com
But nothing is 100%.