Hamilton and Purzycki receive international calls from Ireland and Poland.
- Matthew Hamilton called up for Republic of Ireland.
- Adrian Purzycki to face England with Poland.
- Duo join Owen Evans on international duty.
Hamilton, who qualifies to play for Noel King's side through his grandparents, follows in the footsteps of defender Rob Kiernan who made 14 appearances for the Republic of Ireland Under 21s, also captaining the side.
Ireland will face a double header in Marbella this month, when they face USA on 15 November, before taking on Russia on 17 November.
Upon receiving his first international call-up, the 19-year-old said:
"It's great to be recognised like this and to be given the chance by the Republic of Ireland to be involved in international football.
"I've been working as hard as I can this season and it's a very exciting opportunity to be given."
Youth Team midfielder Purzycki, who took part in a Polish training camp in September, will be part of their Under 18s squad to face England twice on 15 November and 17 November in Gydnia and Gdansk.
News of Owen Evans' international involvement was announced at the end of October, with the goalkeeper set to represent Wales Under 19s in a UEFA tournament in Portugal, with fixtures against Portugal (12 November), Denmark (14 November) and Albania (17 November).