Siwan eng yaxshi nom ma'nolari: Saxiy, Faol, Quvnoq, Do'st, Temperaturali. Qabul qiling Siwan ismining ma'nosi.
Gerlach eng yaxshi familiyasi ma'nolari: Do'st, Saxiy, Ijodiy, Zamonaviy, Uchuvchi. Qabul qiling Familiyasi Gerlach.
Siwan ismining kelib chiqishi. Welsh form of Joan. Qabul qiling Siwan ismining kelib chiqishi.
Eng ko'p ishlatiladigan Gerlach familiyasi Germaniya. Qabul qiling Gerlach familiyasi tarqalishi.
Boshqa mamlakatlar va tillarda, Siwan uchun alohida ismlar: 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. Qabul qiling Siwan boshqa tillarda.
Gerlach ismiga ega bo'lgan eng keng tarqalgan ismlar: Camille, Kerstin, Karen, Gianna. Qabul qiling Gerlach bilan ketadigan ismlar.
Siwan va Gerlach ning mosligi 83%. Qabul qiling Siwan va Gerlach muvofiqligi.