Jonathan Bond is the latest Hornets player to receive an international call-up. The goalkeeper has been selected in the England Under-21 squad for the young Lions' Euro 2015 qualifier against Wales and the Toulon Tournament in France.
Bond, who has one cap for the Under-21s, made 15 appearances for Watford this season but kept only four clean sheets.
Former Hornets loanees Nataniel Chalobah and Josh McEachran have also received call-ups.
England head coach Gareth Southgate has named a 25-man squad for the Euro Championship qualifier against Wales on Monday, May 19.
Tom Ince, Jesse Lingard, Wilfried Zaha and Danny Ings will depart prior to the Toulon Tournament as they will be too old to participate in the competition.
The remaining members of the England squad will then fly out to France where they will face four initial games against Qatar, Colombia, Brazil and Korea Republic.
Their first match of the competition is against Qatar on Thursday, May 22.
England Under-21 squad
Goalkeepers: Jonathan Bond (Watford), Jack Butland (Stoke City), Sam Johnstone (Manchester United).
Defenders: Tyias Browning (Everton), Eric Dier (Sporting Lisbon), Luke Garbutt (Everton), Ben Gibson (Middlesbrough), Michael Keane (Manchester United), Liam Moore (Leicester City), Brad Smith (Liverpool).
Midfielders: Nathaniel Chalobah (Chelsea), Jordan Cousins (Charlton Athletic), Jake Forster-Caskey (Brighton & Hove Albion), Josh McEachran (Chelsea), James Ward-Prowse (Southampton), Tom Ince (Crystal Palace)*, Jesse Lingard (Manchester United)*, Jordan Obita (Reading), Nathan Redmond (Norwich City), Wilfried Zaha (Manchester United)*
Forwards: Saido Berahino (West Bromwich Albion), Harry Kane (Tottenham Hotspur), Danny Ings (Burnley)*, Solly March (Brighton & Hove Albion), Cauley Woodrow (Fulham).
* Only available for the Wales match.