The 18-year-old forward was born in England, but also has Jamaican citizenship and can therefore represent both nations.
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Cadamarteri is the son of former Everton star Danny Cadamarteri.
On Thursday, he was selected for Jamaica's national team, which will play in the CONCACAF Nations League in the coming weeks.
But on Friday, the FA then joined the field.
Cadamarteri was selected for the England U19 national team, which will face Morocco and the USA in two friendly matches.