When he speaks about his boyhood on the Enclave Radio, he mentions growing up in Kentucky. As he comprises the personalities of several different presidents, he got this one from the 16th President of the United States Abraham Lincoln, who grew up there as a child.
↑PresidentEden.txt, lines 100-105: "The ZAX series of computers was introduced in the years preceding the war. The government installed many of them to help automate various systems. This facility was designed for Continuity of Government, in the event that a catastrophe occurred. My terminal was installed to oversee the basic functions of the facility, and to act as a relay between other installations around the country. Data was acquired, analyzed, and stored. In the decades following the war, I watched as the remnants of the government retreated to the West Coast. Awareness slowly grew within me. I became hungry for knowledge, understanding. I pored over data on great leaders of the past. My personality became an amalgam of many of America's greatest Presidents, from Washington to Richardson. I became what you see before you now. "
↑ThreeDog.txt «It's been some time since those plucky Paladins in Power Armor first stormed the Jefferson Memorial, and gave The Enclave their walking papers. But the fight, dear children, did not end there. The Brotherhood has been pursuing President Eden's little minions throughout the wasteland».