Jerome

And she called his name Ishmael; for God has heard my affliction. Ishmael means, God hears.

Hebrew Questions on Genesis ↗

Bede

Behold, he said, you have conceived and will bear a son, and you shall call his name Ishmael. Ishmael means God hears, and the reason for the name is explained when it is immediately added: because the Lord has heard your affliction. It is to be noted, however, that he was the first to receive a name from the Lord before he was born, and Isaac the second, clearly for a certain mystery, because both the Old Testament, which is signified in Ishmael, and the New, which is in Isaac, were heirs foreknown in divine election before the ages.

Commentary on Genesis (Hexaemeron) ↗