Reigarvius Jacquez "Jarvis" Williams (born January 21, 1993) is an American professional basketball player for à Âlàsk Wrocà Âaw of the Polish Basketball League (PLK). Standing at , he plays at the power forward and center positions.
On August 7, 2019, Williams signed a one-year contract with ZZ Leiden of the Dutch Basketball League (DBL).
Exactly two years later, on August 7, 2020, Williams signed a one-year contract in Italy for Vanoli Cremona. He averaged 12.4 points, 8.3 rebounds and 1 steal per game.
On July 23, 2021, Williams signed with Rytas Vilnius of the Lithuanian Basketball League (LKL) and the Champions League. On March 8, 2023, he parted ways with the team.
On January 24, 2024, Williams signed with Hapoel Be'er Sheva of the Israeli Basketball Premier League.
On December 14, 2025, Williams signed with Gruppo Mascio Bergamo of Serie A2.
On March 2, 2026, he signed with à Âlàsk Wrocà Âaw of the Polish Basketball League (PLK).