Wise, old, or a variant of Cyan
Syan is a rare name with multiple potential roots. It is often used as a phonetic variant of the Welsh name Sian (meaning 'God is gracious') or as a creative spelling of Cyan, referring to the greenish-blue color. In some contexts, it is associated with the Sanskrit word 'Syan' meaning 'wise' or 'learned'.
Less common today
Syan isn't in the latest US Top 1000. It last peaked at #6,477 in 1999.
US births per 5-year period, 1990βpresent (SSA data).