Jaak eng yaxshi nom ma'nolari: Faol, Diqqat bilan, Saxiy, Uchuvchi, Omadli. Qabul qiling Jaak ismining ma'nosi.
Jaak ismining kelib chiqishi. Estonian form of Jacob or James, and a Flemish short form of Jacob. Qabul qiling Jaak ismining kelib chiqishi.
Boshqa mamlakatlar va tillarda, Jaak uchun alohida ismlar: Akiba, Akiva, Cobus, Coby, Coos, Giacobbe, Giacomo, Hagop, Hakob, Hemi, Iacobus, Iacomus, Iacopo, Iago, Iakob, Iakobos, Iakopa, Ib, Jákob, Jaakko, Jaakob, Jaakoppi, Jaap, Jacky, Jacob, Jacobo, Jacobus, Jacó, Jacopo, Jacques, Jago, Jaime, Jaka, Jakab, Jake, Jakes, Jakob, Jakov, Jakša, Jakub, Jákup, James, Jamey, Japik, Jaša, Jaska, Jaume, Jaumet, Jay, Jaycob, Jaymes, Jeb, Jem, Jemmy, Jeppe, Jim, Jockel, Jokūbas, Kapel, Kimo, Koba, Kobe, Kobus, Koby, Koos, Koppel, Kuba, Lapo, Séamas, Séamus, Seumas, Shamus, Sheamus, Sjaak, Sjakie, Yaakov, Yago, Yakiv, Yakov, Yakub, Yakup, Yankel, Yaqoob, Yaqub, Yasha. Qabul qiling Jaak boshqa tillarda.
Lied ismiga ega bo'lgan eng keng tarqalgan ismlar: Ria, Jay, Judi, Keitha, Danilo. Qabul qiling Lied bilan ketadigan ismlar.