Little ruler or descendant of Riagán
Raegen is a modern spelling variant of the Irish name Reagan. It is derived from the Gaelic surname Ó Riagáin, which stems from the word 'ri' meaning king, combined with a diminutive suffix. While historically a surname, it gained popularity as a given name in the United States during the late 20th century.
Less common today
Raegen isn't in the latest US Top 1000. It last peaked at #3,676 in 2016.
US births per 5-year period, 1990–present (SSA data).