Jef uiga igoa sili: Foafoa, Laki, Faauo, Agavaa, Matuia. Aumai Jef uiga o le suafa.
Kock uiga faaiu sili: Fiafia, Agalelei, Foafoa, Po nei, Laki. Aumai Kock uiga o faaiu.
Jef amataga o le igoa muamua. Dutch short form of Jozef. Aumai Jef amataga o le igoa muamua.
Kock tupuaga. Low German cognate of Cook. Aumai Kock tupuaga.
E tusitusiga po o le auala e faalauiloa le igoa muamua Jef: YEF. E faapefea e faalauiloa Jef.
Igoa tutusa mo Jef i atunuu ma gagana eseese: Beppe, Giuseppe, Hohepa, Hovsep, Ioseb, Ioseph, Iosephus, Ioses, Iosif, Jāzeps, Jo, Joĉjo, Joe, Joey, Jojo, Joosep, Jooseppi, Józef, Joseba, José, Josèp, Josef, Josep, Josepe, Joseph, Josephus, Joses, Josif, Josip, Jóska, Joško, Joso, Jože, Jozef, Jozefo, Jozo, József, Józsi, Jožef, Juozapas, Juozas, Juuso, Osip, Pepe, Pepito, Peppe, Peppi, Peppino, Pino, Seòsaidh, Seosamh, Sepp, Seppel, Soso, Xosé, Yosef, Yosif, Yosyp, Yousef, Youssef, Yusef, Yusif, Yussel, Yusuf, Yusup, Zé, Zezé. Aumai Jef i isi gagana.
Tutusa surnames mo Kock i atunuu ma gagana eseese: Coke, Cokes, Cook, Cooke, Cookson, Cuocco, Cuoco, Koch. Aumai Kock i isi gagana.
Surnames taatele ma igoa Jef: Shelby. Aumai Lisi o surnames ma igoa Jef.
O le tele o igoa tutusa ai ma faaiu Kock: Alexis, Carlton, Junaida, Dena, Edseree. Aumai Igoa e aumai faatasi Kock.
Ogatasi o Jef ma Kock o 80%. Aumai Ogatasi o Jef ma Kock.