Is the email address something someone else might enter by accident? I constantly get emails intended for someone who has the same surname and first initial as

Is the email address something someone else might enter by accident? I constantly get emails intended for someone who has the same surname and first initial as me (and presumably a very similar email). She signs up for all sorts of things and accidentally enters my email (it's quite annoying). I even got her plane tickets once. And I can see loads of FB advertiser matches that are clearly her rather than me.