Natalie Portman

Make no mistake, Natalie Portman and fiancé Benjamin Millepied think their newborn son is No. 1.

The couple, who welcomed their first child last month, have named the child Aleph, which means the numeral "1" in Hebrew, People reports.

Natalie Portman welcomes a son

Aleph is also the first letter in the Hebrew alphabet. The name can also be spelled "alef." The esoteric meaning in Judaic Kabbalah relates to the origin of the universe, the "primordial one that contains all numbers."

Portman, who is originally from Israel, learned to speak Hebrew when she was growing up.

The 30-year-old actress met Millepied on the set of Black Swan, for which she won the Oscar for Best Actress earlier this year. She most recently starred in Thor.

What do you think of the name? Sound off in the comments below!