1.

Rashi: The angel is informing Hagar that Yishmael will love hunting in the desert, as the Pasuk writes later (Bereishis 21:20) "And he dwelt in Midbar Paran ¹ ...." According to Rashi's translation of "Pera'im" (Iyov 24:5), ² it means that he ran wild in the desert to rob and kill innocent wayfarers.

2.

Seforno: A Pere is a wild donkey, and that is what Yishma'el will be from his mother's side; ³ while he will be an Adam (a proper person) from his father's side. ⁴

3.

Targum Yonasan: He will be like a wild man among people.

4.

Ramban: "Pere" Adam" is like "Ish Pere" - a wild man who is trained to work in the desert - he goes there each morning to attack people, and they attack him.

1.

Rashi: He meant that Yishmael will be a robber and everyone will hate him for it and fight with him.

2.

Targum Yonasan: His hand will be outstretched to fight his enemies and their hand will be outstretched to fight him.

3.

Ramban #1: It refers to the wars that his children will fight with all the other nations and that the other nations will fight with them.

4.

Ramban #2 (citing Ibn Ezra): Initially, Yishma'el's children will defeat the other nations, but ultimately, the other nations will defeat them.

1.Oznayim la?Torah: Because, bearing in mind that Avraham was destined to expel him from his house, he was placing the onus of educating him to be an ?Adam? and not a ?Pere?, ¹ on her - which she fulfilled, even to the point of finding him a wife from Egypt, ² but he remained a Pere Adam.

2.

Perhaps the main objective of this information was the end of the Pasuk ? aas if to say ?although he will be a Pere Adam, ?al-P?nei Kol Echav Yishkon?. ³

1.

Rashi: The children of Yishmael will proliferate.

2.

Ramban: They will exceed their brothers, the sons of Keturah.

3.

Targum Yonasan: They will intermingle with their brothers (or overpower them - See Sefer 'Na'ar Yonasan').