Queen or grace
Reyann is a modern compound name likely blending the Spanish word 'Rey' (meaning king, though used here as a prefix for queenly associations) or the English 'Ray' with the classic name 'Ann'. It carries the dual connotation of royal stature and favor or grace.
Less common today
Reyann isn't in the latest US Top 1000. It last peaked at #11,052 in 1999.
US births per 5-year period, 1990βpresent (SSA data).