Likely a modern variant of Raiden, meaning thunder and lightning.
Reiden is a contemporary American invention, most likely a creative spelling of the Japanese name Raiden. In Japanese mythology, Raiden is the god of thunder and lightning, derived from the words 'rai' (thunder) and 'den' (lightning). It may also be influenced by the popular 'aden' naming trend in the United States.
Less common today
Reiden isn't in the latest US Top 1000. It last peaked at #7,539 in 2016.
The eternal God of Thunder and protector of Earthrealm. Β· Mortal Kombat
US births per 5-year period, 1990βpresent (SSA data).