I was looking at signing up for an online account at a reputable web site (Vanguard) when I noticed something suspicious. When the site prompted me with a form to enter my name, I noticed--as usual--multiple variations of my name with previous addresses that I've had from Chrome autofill. But in addition to this I noticed the name of a friend I knew in college years ago. It included his first and last name with the zip code he currently lives in. This person has never had physical access to this computer, and I am signed in using a recently created google account that he has no knowledge of. Most interesting is that the autofill includes his current zip code that wasn't associated to him when we were in the same city.
Has my computer been compromised? What has happened here? While this is the first time that I've tried to sign up to this site, I've never seen his name show up in autofill applications before. Can I trust any of my accounts going forward?