That happens a lot, as in Abijah vs Abijam. Names were actual phrases in the language at the time, e.g. Abijah means "father is the LORD". If you called that person "father is God", for example, it would be understood who you were referring to. It wasn't letter-perfect like today's names are. For Uriel of Gibeah it seems likely that it was either Absalom's son (which would make sense since Absalom was much older than Solomon, so Absalom's direct daughter would have probably been older than Rehoboam, which seems unlikely since she wasn't even Rehoboam's first wife), or Uriel was maybe Absalom's father-in-law and so grandfather to Maacah. The terminology in the Bible, and perhaps in the original Hebrew, was less specific because descent from someone was seen as important for inheritance purposes, so it wouldn't matter if you were their direct child or if you were their grandchild or great-grandchild, you were still their descendant. So because of this the word "grandmother" appears only once in the whole Bible (II Timothy 1:5), and "grandfather" nowhere. It makes it a little harder to trace what's going on sometimes, but that's kind of interesting in a way
In reply to <p>I'm confused about the by Anonymous
That happens a lot, as in Abijah vs Abijam. Names were actual phrases in the language at the time, e.g. Abijah means "father is the LORD". If you called that person "father is God", for example, it would be understood who you were referring to. It wasn't letter-perfect like today's names are. For Uriel of Gibeah it seems likely that it was either Absalom's son (which would make sense since Absalom was much older than Solomon, so Absalom's direct daughter would have probably been older than Rehoboam, which seems unlikely since she wasn't even Rehoboam's first wife), or Uriel was maybe Absalom's father-in-law and so grandfather to Maacah. The terminology in the Bible, and perhaps in the original Hebrew, was less specific because descent from someone was seen as important for inheritance purposes, so it wouldn't matter if you were their direct child or if you were their grandchild or great-grandchild, you were still their descendant. So because of this the word "grandmother" appears only once in the whole Bible (II Timothy 1:5), and "grandfather" nowhere. It makes it a little harder to trace what's going on sometimes, but that's kind of interesting in a way