Parashas Chayei Sarah · Passuk 25:13
These are the names of the sons of Yishmael, by their names, in the order of their birth: Nevayot, the first-born of Yishmael, Kedar, Adbe’el, Mivsam,
Rashi on Bereishis 25:13 (classical source on this passuk; not listed as a numbered Torah Temimah unit here).
Lemma / focus: בשמתם לתולדתם.
English: By the order in which they were born one after the other.
Derash on the verse (Rashi) — not a formal named middah of the 13: “by their names according to their generations” is taken as chronological birth order.
The sons of Yishmael are listed by the order of their birth, one after the other.