Sian \sian\ as a girl's name is pronounced shaahn. It is of Welsh origin. Variant of Jane (Hebrew) "God's grace". See also Seana, Shana, Shanae, and Shawna. Actress Sian Phillips.
Sian has 2 variant forms: Siana and Sianna.
For more information, see also the related name Shan.
Baby names that sound like Sian are San and Sean.