The ancient names recorded in the biblical genealogies represent early peoples and tribes that spread across the ancient world. While the historical footprint of some of these nations remains clear and well-documented, others have faded into mystery over time.
Regarding the tribe of Obal, some scholars maintain that all knowledge of their specific identity has been lost to history [שד״ל]. Alternatively, they may be connected to a district and a series of ancient settlements in the region of Yemen, known by a very similar name [קאסוטו].
A similar historical mystery surrounds the tribe of Abimael. While their exact historical identity is also considered lost by some [שד״ל], ancient Southern Arabic dialects provide a fascinating clue about their culture. A specific syllable in their name served as a term of emphasis in ancient languages, giving their name the profound meaning, "My father, indeed, is God" [קאסוטו].
In sharp contrast to these lesser-known tribes, Sheba was an ancient and highly famous nation. They were situated in the fertile lands of the Arabian Peninsula, and their prominent status in the ancient world is reflected by their frequent appearances throughout biblical history [שד״ל, ביאור שטיינזלץ].