Months were originally called just first month, second month, third month etc., man societies gave names to the months.

Canaanite influence on month names:
Abib, Ethanim, Bul, Zif etc

Babylonian influence on month names:
Nisan, Sivan, Tammuz, Elul, Adar etc

Roman influence on month names:
March, July, February etc

We use the Roman influenced names these days. Like the first month is March in the New Jerusalem Kingdom of God and Jesus Christ on Earth.