Siobhan \sio(b)-han\ as a girl's name is pronounced sha-VAHN. It is of Irish and Hebrew origin, and the meaning of Siobhan is "God is gracious". Variant of Joan, which is a feminine form of John. Phonetic forms of this name are a blend of the Sha- prefix with Yvonne. Actress Siobhan McKenna.
Siobhan has 20 variant forms: Chavonne, Chevonne, Chivon, Chyvonne, Shavaun, Shavon, Shavonne, Shervan, Shevon, Shevonne, Shirvaun, Shivahn, Shivaun, Shovonne, Shyvonne, Sh'vonne, Sioban, Siobahn, Siobhian and Syvonne.
For more information, see also the related name Jane.