Natalie Portman’s Baby Name Revealed

Natalie Portman

Jason Merritt/Getty

updated 07/06/2011 AT 2:00 PM ET

originally published 07/06/2011 AT 3:00 PM ET

Natalie Portman and fiancé Benjamin Millepied get an A-plus for the name they picked for their baby boy.

Their son’s name is Aleph, a source confirms to PEOPLE.

So what’s in a name? Aleph is the first letter of the Hebrew alphabet, much like alpha is the first letter of the Greek alphabet. Aleph is the number 1 in Hebrew and can also be spelled “alef.”

Its esoteric meaning in Judaic Kabbalah, as denoted in the theological treaty Sefer-ha-Bahir, relates to the origin of the universe, the “primordial one that contains all numbers.”

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