Mj

A two-initial nickname occasionally used on birth certificates. This is especially popular for girls, thanks to Spiderman's sweetheart Mary Jane "MJ" Watson.

Mj is also given to boys, where it ranks #5765 in the US.

Pronounced em-JAY.

As of October 2026, Mj ranked #5765 for boys in US births in 2025 and #14665 for girls in US births in 2024 SSA, peaked at #5465 for boys in 2018 and #9454 for girls in 2022.