Larry Ganem was an Elder of the Men of Letters.
History
In 1958 he was with the group on the night of Henry Winchester and Josie Sands's initiation into the organisation. However, the demon Abaddon attacked and blinded Larry. He was able to give Henry the Key to their secret hideout before Abbadon could get it. Larry was the only member to escape Abaddon's rampage, suffering the loss of his sight at her hands.
Larry blinded by Abaddon in 1958.
Suspecting Henry had survived, he left a clue at the gravesite of the Men of Letters so Henry would be able to track him down.
Season 8
He later married and lived till 2013 by at which point he was 112, there in his home he was met by Sam Winchester, who informed him he was Henry's grandson. Larry explained what had happened, and told Sam about the existance of there Hideout, so he could keep it safe from Abaddon. Unforetunety it turned out that Abaddon had also tracked him down, and had taken control of his wife. She knocked out Sam and turned on Larry, who she killed with a single swipe of a butchers knife.