Williams’ central defensive partnership with Federico Fernandez will be restored after Monk named a makeshift team for the FA Cup victory at Tranmere and England Under-20 midfielder Matt Grimes and Portuguese loan striker Nelson Oliveira are included in the squad for the first time after January moves.
Top scorer Wilfried Bony, who is on the verge of completing a ??30million transfer to Manchester City, and Ki Sung-yueng are both away on international duty while Jonjo Shelvey (suspension) and Jefferson Montero (hamstring) remain unavailable.
West Ham duo Diafra Sakho and Cheikhou Kouyate are ruled out of the Hammers’ visit to Swansea.
Kouyate has departed to play for Senegal at the African Nations Cup and Sakho was expected to join him but the striker suffered a recurrence of a back injury against West Brom on New Year’s Day and has remained at West Ham.
Sam Allardyce has no other injury concerns for the clash at the Liberty Stadium, where the Hammers will be looking to register their first win in four league matches.