Grimoald II (died 689) was the duke of Benevento from 687 to his death.
[1][2] He was the son and successor of Romuald I of Benevento.
He was possibly under the regency of his mother, Theodrada, daughter of Lupus of Friuli.
His reign of three years was uneventful: Paul the Deacon records nothing but his marriage and death.
He was married to Wigilinda, daughter of King Perctarit.