cohen102510_2307.jpgIsla Fisher and hubby Sacha Baron Cohen have kept baby #2's name a secret since she was born last August.

But now the Rango star has finally decided to open up (we'd all find out eventually!) and reveal the six-month-old's identity to Us Weekly: Elula Lottie Miriam Cohen.

Why Elula? Elula is the Hebrew name for August. Fisher explained her reason for the secrecy, revealing, "Motherhood is my favorite topic but I never talk about it publicly. As much as I love what I am doing, and I am so fortunate to have the opportunities that I have had, my responsibility is to my family."

Baby Elula joins big sister Olive, 3.