Siwan siyifikasyon Non pi bon: Jenere, Aktif, Kè kontan, Zanmitay, Tanperaman. Jwenn Siwan siyifikasyon nan non.
Siwan orijin nan premye non. fòm Welsh nan Joan. Jwenn Siwan orijin nan premye non.
Non synonyme pou Siwan nan diferan peyi ak lang: Asia, Chevonne, Gia, Gianna, Giannina, Giovanna, Giovannetta, Hanna, Hanne, Hannele, Hannie, Ioana, Ioanna, Iohanna, Ivana, Jana, Jane, Janessa, Janice, Janina, Janna, Janne, Jannicke, Jannike, Jean, Jeanne, Jehanne, Jennigje, Jo, Joan, Joana, Joanie, Joaninha, Joann, Joanna, Joanne, Joasia, Joetta, Joey, Johana, Johanna, Johanne, Johanneke, Johnna, Jojo, Joleen, Jolene, Jone, Jonelle, Jonette, Joni, Jonie, Jonna, Jóhanna, Jóna, Jovana, Juana, Juanita, Nana, Seona, Seonag, Seònaid, Shauna, Shavonne, Shawna, Sheona, Shevaun, Shevon, Shona, Sìne, Síne, Siobhán, Tajuana, Vanna, Xoana, Yana, Yanka, Yanna, Yoana, Zhanna, Žana. Jwenn Siwan nan lòt lang.
Ki pi komen non ak siyati Lanich: Vina, Elliott, Richie, Kermit, Tony. Jwenn Non ki ale ak Lanich.