https://www.cbcg.org/twobaby/sect222.html

"Nimr-rod"; from Nimr, a "leopard," and rada or rad "to subdue." …

There is no doubt that Nimrod was a rebel, and that his rebellion was celebrated in ancient myths; but his name in that character was not Nimrod, but Merodach, or, as among the Romans, Mars, "the rebel"; or among the Oscans of Italy, Mamers, "The causer of rebellion." That the Roman Mars was really, in his original, the Babylonian god, is evident from the name given to the goddess, who was recognised sometimes as his "sister," and sometimes as his "wife"–i.e., Bellona, which, in Chaldee, signifies, "The Lamenter of Bel" (from Bel and onah, to lament). The Egyptian Isis, the sister and wife of Osiris, is in like manner represented, as we have seen, as "lamenting her brother Osiris."

This name seems to imply, that as Nimrod had gained fame by subduing the horse, and so making use of it in the chase, so his fame as a huntsman rested mainly on this, that he found out the art of making the leopard aid him in hunting the other wild beasts…