@REPNot in Judeo-Christian mythology, but this might be possible in some Eastern systems.
The word Angel, in Biblical Hebrew, translates as "messenger" (or, more accurately, "one who is sent"). The references to angels in the Tanakh are not personified at all. No names, no imagery, nothing. It's very functional: angels sent to hear prayers, angels sent to help good people fight bad people, angels sent to teach mankind of the Lord's ways.
Most of the personification of angels, such as giving them names, each having a specific function, creating a hierarchy, etc. comes from medieval Christian mythology, though there's a bit in medieval Jewish texts as well.
You might be thinking of the Nephilim:
The Nephilim were in the earth in those days, and also after that, when the sons of God came in unto the daughters of men, and they bore children to them; the same were the mighty men that were of old, the men of renown. (Genesis 6:1-4)
Sources about the Nephilim are few and contradictory, so it's unclear what they were, but hybrids of angel and human seems to be the consensus. Some scholars think this might be a reference to fallen angels, others that it was an attempt to explain the Greco-Roman hero myths from a Jewish viewpoint (ie, how could demigods exist?).