Siwan maana ya jina bora: Ukarimu, Kazi, Furaha, Kirafiki, Temperament. Pata Siwan maana ya jina.
Oka maana ya jina la juu: Bahati, Furaha, Tete, Temperament, Kirafiki. Pata Oka maana ya jina la jina.
Siwan asili ya jina la kwanza. Aina ya Welsh Joan. Pata Siwan asili ya jina la kwanza.
Jina la mwisho Oka la kawaida zaidi Côte d'Ivoire, Japani, Ivory Coast. Pata Oka kutangaza jina la jina.
Majina ya jina la Siwan katika nchi tofauti na lugha tofauti: 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. Pata Siwan kwa lugha zingine.
Majina ya kawaida yenye jina la mwisho Oka: Harshal, Abe, Evonne, Bobby, Tobias. Pata Majina yanayotembea na Oka.
Utangamano wa Siwan na Oka ni 82%. Pata Utangamano wa Siwan na Oka.