[1] Born to the Duke and Duchess of Savoy at the Royal Palace of Turin, he was the couple's fourth child.
His sisters included the future "grand daughters in law" of Louis XV of France, Princess Maria Giuseppina, who married the future Louis XVIII of France in 1771 and Princess Maria Teresa, wife of the future Charles X of France, married in 1773.
[2] His brothers included the last three kings of Sardinia from the mainline; the future Charles Emmanuel IV, Victor Emmanuel I and Charles Felix of Sardinia.
Amadeus Alexander died on 29 April 1755, in Turin, at the age of six months.
He was buried in the Basilica of Superga, traditional burial site of the House of Savoy.