Meaning and history
Siân is the Welsh form of Jane, ultimately derived from John and meaning "Yahweh is gracious." Its spelling uses the circumflex to mark the long vowel, and it has remained a recognizably Welsh counterpart to English Jane and French Jeanne. Notable bearers include Welsh actress Siân Phillips and journalist and broadcaster Siân Williams.
20062006: no US SSA record for this spelling
2007: 6 births, rank #10,921
2008: 7 births, rank #9,871
2009: no US SSA record for this spelling
2010: 6 births, rank #10,766
20112011: no US SSA record for this spelling
2012: 5 births, rank #12,274
2013: no US SSA record for this spelling
2014: 5 births, rank #12,108
2015: no US SSA record for this spelling
20162016: 9 births, rank #8,146
2017: 7 births, rank #9,696
2018: 8 births, rank #8,819
2019: 8 births, rank #8,889
2020: 12 births, rank #6,620
20212021: 14 births, rank #6,032
2022: 11 births, rank #7,262
2023: 13 births, rank #6,517
2024: 9 births, rank #8,312
20252025: 26 births, rank #4,050
In 2025, 26 babies were recorded with the name Siân, ranking #4,050 among boys.