| SARR | Ismaila .... , Senegal, Marseille and 2019-23 Watford midfielder (4) |
| BEYE | Habib ..... former Senegal, Marseille and Newcastle United defender (4) |
| BILIC | Slaven ..... , 2015-17 West Ham United, 2019-20 West Brom and 2022-23 Watford manager (5) |
| PUSSETTO | Ignacio ........ , 2018-20 Udinese and 2020-23 Watford attacker (8) |
| AINA | Nigeria, Nottingham Forest and 2019-23 Torino defender (4) |
| KONE | Canada, Marseille, 2021-22 CF Montreal and 2023-24 Watford midfielder (6,4) |
| ISSA | Pierre ...., 1995-2001 Marseille and 2001-02 Watford defender (4) |
| ANYA | Ikechi .... , 2013-17 Scotland and 2013-16 Watford midfielder (4) |
| HYDE | Micah ...., 2001 -04 Jamaica and 1997-2004 Watford midfielder (4) |
| ABDI | 2008-09 Switzerland and 2013-16 Watford midfielder (5,4) |
| YOBO | Joseph .... , 2001-14 Nigeria, 2001-03 Marseille and 2003-12 Everton defender (4) |
| WILL | Watford midfielder signed from Derby (4,6) |
| EDDY | Keith .... , 1966-72 Watford midfielder (4) |
| BOLI | Basile .... , 1986-93 France, 1990-94 Marseille and 1994-95 Rangers defender; 1993 Champions League Final winner (4) |
| IOKA | Kazuto .... , 2019-23 WBO junior bantamweight champion (4) |
| GRIX | Simon .... , 2019-23 Halifax Panthers coach (4) |
| SOLOMON | Israel, Tottenham Hotspur and 2019-23 Shakhtar Donetsk midfielder; 2022-23 Fulham loanee (7) |
| MANOR | Israel, Tottenham Hotspur and 2019-23 Shakhtar Donetsk midfielder; 2022-23 Fulham loanee (5) |
| IWOBI | Alex ..... , Nigeria, Fulham, 2015-19 Arsenal and 2019-23 Everton midfielder (5) |
| MATEO | Croatia, Man City and 2019-23 Chelsea midfielder (5,7) |
