Wales head coach Warren Gatland has named four uncapped players to his squad for the Guinness Six Nations championship. 

Ospreys center Keiran Williams, Cardiff center Mason Grady, Ospreys lock Rhys Davies and Cardiff second-row forward Teddy Williams all have been selected. 

The quartet are the only international rookies among a 37-man group, with Gatland's second spell as Wales boss beginning against Ireland on Feb. 4.

Scarlets hooker Ken Owens has been appointed captain, being preferred to other candidates, such as Justin Tipuric, Dan Biggar and Alyn Wyn Jones. 

🏴󠁧󠁢󠁷󠁬󠁳󠁿 Capten Cymru 🏴󠁧󠁢󠁷󠁬󠁳󠁿 pic.twitter.com/nrF0BWApEu

— Welsh Rugby Union 🏴󠁧󠁢󠁷󠁬󠁳󠁿 (@WelshRugbyUnion) January 17, 2023

Elsewhere, there are recalls for 34-year-old Ospreys scrum-half Rhys Webb - who last played test rugby in 2020 - Ospreys fly-half Owen Williams, Scarlets back Rhys Patchell, Cardiff prop Rhys Carre and Dragons back-row forward Aaron Wainwright.

Selection absentees include Ross Moriarty, Nicky Smith and Ryan Elias, while injuries have sidelined the likes of fly-half Gareth Anscombe and lock Will Rowlands. But Gloucester wing Louis Rees-Zammit, who is currently out of action due to an ankle problem, has been picked.

"It's probably a bigger squad than I would normally name, but we want to have a good Six Nations and also look forward to the World Cup," Gatland said. "We have some youngsters that have come in, and then we've some older, very experienced players we need to manage.

"It is looking at the whole element for the squad and how we get the balance right, because that is definitely going to be a challenge over the next 10 months."

On the captaincy, Gatland added: "Ken is incredibly experienced and a passionate Welshman - it means a lot to him to play for Wales. He is also very popular with the players. He came back from injury and was absolutely outstanding during the autumn campaign. Probably, if you are picking a team at the moment, he is the No. 1 in that position."

🏴󠁧󠁢󠁷󠁬󠁳󠁿 Official : Jonathan Thomas joins the Welsh setup, being responsible for the contact area.

He won 67 Welsh caps and has coached at @BristolBears, @WorcsWarriors and @ealingtfrugby.

🤝 Croeso Jonathan! pic.twitter.com/YUVfGR1DQ2

— Welsh Rugby Union 🏴󠁧󠁢󠁷󠁬󠁳󠁿 (@WelshRugbyUnion) January 17, 2023

It also was confirmed that ex-Wales back-rower Jonathan Thomas has been recruited by Gatland to coach the contact area. 

A WRU tweet read: "Official - Jonathan Thomas joins the Welsh setup, being responsible for the contact area. He won 67 Welsh caps and has coached at Bristol, Worcester and Ealing. Croeso, Jonathan!"

Wales' Guinness Six Nations Squad

Forwards (20)
Rhys Carre (Cardiff Rugby 17 caps)
Wyn Jones (Scarlets - 45 caps)
Gareth Thomas (Ospreys - 17 caps)
Dewi Lake (Ospreys - 8 caps)
Ken Owens (Scarlets - 86 caps), Captain
Bradley Roberts (Dragons - 3 caps)
Leon Brown (Dragons - 22 caps)
Tomas Francis (Ospreys - 67 caps)
Dillon Lewis (Cardiff Rugby - 45 caps)
Adam Beard (Ospreys - 41 caps)
Rhys Davies (Ospreys - uncapped)
Dafydd Jenkins (Exeter Chiefs - 1 cap)
Alun Wyn Jones (Ospreys - 155 caps)
Teddy Williams (Cardiff Rugby - uncapped)
Taulupe Faletau (Cardiff Rugby - 95 caps)
Jac Morgan (Ospreys - 6 caps)
Tommy Reffell (Leicester Tigers - 4 caps)
Justin Tipuric (Ospreys - 89 caps)
Christ Tshiunza (Exeter Chiefs - 3 caps)
Aaron Wainwright (Dragons - 36 caps)

Backs (17)
Kieran Hardy (Scarlets - 16 caps)
Rhys Webb (Ospreys - 36 caps)
Tomos Williams (Cardiff Rugby - 40 caps)
Dan Biggar (Toulon - 103 caps)
Rhys Patchell (Scarlets - 21 caps)
Owen Williams (Ospreys - 3 caps)
Mason Grady (Cardiff Rugby - uncapped)
Joe Hawkins (Ospreys - 1 cap)
George North (Ospreys - 109 caps)
Nick Tompkins (Saracens - 25 caps)
Keiran Williams (Ospreys - uncapped)
Josh Adams (Cardiff Rugby - 44 caps)
Alex Cuthbert (Ospreys - 55 caps)
Rio Dyer (Dragons - 3 caps)
Leigh Halfpenny (Scarlets - 97 caps)
Louis Rees-Zammit (Gloucester Rugby - 22)
Liam Williams (Cardiff Rugby - 81