Same with Yehudis, the popular Jewish-sounding name, originally of the wife of Eisav!
BS”D
I think that it is used now because of Yehudis who did away with Holofernes YMS and possibly was originally used for girls named in memory of a Yehuda.
I once read that Nimrod became popular due to the “Canaanite” movement of the early secular Zionists. Anat is also the name of a Canaanite Avodah Zarah.
BS”D
Yes, Nimrod and names like it came from the extreme left. More obscure names such as Anat became accepted because no one bothered to check the source.