Fatu dilahirkan dalam keluarga pegulat [[Orang Samoa|Samoa]] [[Keluarga Anoaʻi|Anoaʻi]], yang meliputi ayahnya, [[Rikishi (pegulat)|Rikishi]] seorang [[WWE Hall of Fame|WWE Hall of Famer]]r, kakak laki-lakinya [[Jimmy Uso]] dan [[Jey Uso]], sepupunya [[Roman Reigns]], dan banyak lainnya termasuk [[Umaga (pegulat)|Umaga]], [[Yokozuna (pegulat)|Yokozuna]], dan [[the Wild Samoans]]. Namanya diambil dari nama sepupunya, Yokozuna.<ref>{{Cite web |last=Middleton |first=Marc |date=2023-01-01 |title=Solo Sikoa Reveals WWE Hall of Famer He Got His Middle Name From |url=https://wrestlingheadlines.com/solo-sikoa-reveals-wwe-hall-of-famer-he-got-his-middle-name-from/ |access-date=2023-06-18 |website=Wrestling Headlines |language=en-US}}</ref> Dia bermain [[sepak bola Amerika]] di [[American River College]] dan [[Dickinson State University]].<ref>{{Cite web |title=Joseph Fatu |url=https://www.arcbeavers.com/sports/fball/2013-14/players/josephfatulozb |archive-url=https://web.archive.org/web/20230430175517/https://www.arcbeavers.com/sports/fball/2013-14/players/josephfatulozb |archive-date=April 30, 2023 |access-date=October 2, 2022 |website=[[American River College]] |language=en}}</ref><ref>{{cite web |title=Sefa Fatu's DSU Bluehawks profile |url=https://www.dsubluehawks.com/roster/7/4/1186 |archive-url=https://web.archive.org/web/20221127193621/https://www.dsubluehawks.com/roster/7/4/1186 |archive-date=November 27, 2022 |access-date=November 4, 2022 |website=[[Dickinson State University]]}}</ref>
