Matilda of Savoy (French: Mathilde, Portuguese: Mafalda; 1125-1158) was the first Queen of Portugal. Her husband was King Afonso I, the firstsovereign of Portugal, whom she married in 1146.
She was the second or third daughter of Amadeus III of Savoy, Count ofSavoy and Maurienne, and Mahaut of Albon (the sister of Guigues IV of Albon, "le Dauphin").
Walter Map tells a story that "the King of Portugal now living", almost certainly Afonso, had been convinced by evil counselors to murder hispregnant wife out of misplaced jealousy. However, there is no other authority for this account, and it is not generally accepted.