Usually refers to one’s family. Sometimes used (as in Shakespeare’s original) to denote all living creatures.
From Shakespeare’s Hamlet.
Er, no, that’s not from Hamlet. It’s from All’s Well That Ends Well (I.iii).
I love quirky online databases, too, but here’s one example of why failing to confirm what you find online can lead to trouble. The consequences in this case are negligible, but imagine somebody going online to make health-related decisions!