Little king or illustrious
Ryenn is a modern feminine spelling variant of Ryan. It originates from the Irish surname Γ Riain, which is derived from the word 'rΓ' meaning king, combined with a diminutive suffix. While traditionally masculine, this stylized spelling is used almost exclusively for girls in the United States.
Less common today
Ryenn isn't in the latest US Top 1000. It last peaked at #7,890 in 2014.
US births per 5-year period, 1990βpresent (SSA data).