Holy, pure, or star
Seira is a name with multiple cultural threads. In a Japanese context, it often combines kanji meaning 'holy' or 'star' with 'good' or 'silk'. It is also occasionally used as a variant of the Hebrew Sarah, meaning 'princess'.
Less common today
Seira isn't in the latest US Top 1000. It last peaked at #8,479 in 1990.
Japanese model and singer
The protagonist known as Saint Tail Β· Saint Tail
The Orange Pearl Voice mermaid princess Β· Mermaid Melody Pichi Pichi Pitch
US births per 5-year period, 1990βpresent (SSA data).