The short note scrawled on the card suggests his family changed its name to Ahmadinejad when they converted to embrace Islam after his birth.
Golnaz Esfandiari blogged about Ahmadinejad's "Jewish family" in January, when the son of a conservative cleric called for the Iranian president's family roots to be investigated.
UPDATE: Writing in "The Guardian," Meir Javedanfar casts doubt on the Jewish links:
The Sabourjians were one of many such families. Their surname was related to carpet-making, an industry that conjures up images of sweatshops. They changed it to Ahmadinejad in order to help them fit in. The new name was also chosen because it means from the race of Ahmad, one of the names given to Muhammad.
And writing for the "Atlantic," John Hudson sums up some of the debate in the blogosphere about whether it would even matter if Ahmadinejad was Jewish.
-- Luke Allnutt