These were the sons of Ishmael, and these were their names by their villages and encampments—twelve princes of their tribes.
Immediately after the account of Abraham's death, Moses begins the story of Isaac (Gen 25:11), and tells us where he dwelt and how remarkably God blessed him. Note, The blessing of Abraham did not die with him, but survived to all the children of the promise.
Commenting on Genesis 25:11-18
These are the sons of Ishmael,.... The twelve before mentioned, Gen 25:13, these are their names, by their towns and by their castles; their towns and their castles being called after their names, some of which we are able to trace at this distance, as the above notes show: twelve princes according to their nations; these were princes, or heads of tribes, and there were...
These are their names - By which their descendants were called. Their towns - places of encampment in the wilderness, such as have been used by the Arabs from the remotest times. Their castles, טירתם tirotham, their towers, probably mountain tops, fortified rocks, and fastnesses of various kinds in woods and hilly countries.