My Hotmail account displays my name sometimes, but another name in other emails. How do I correct this?

My Hotmail account in my name at hotmail.com.  Somehow my account has been linked with another account from my kids and now when certain people email me or I email them it uses one of the kids' names instead of mine in the To/From line.  I have looked all over my profile and my settings and cannot find the kid's name anywhere, yet it continues to appear in the To/From line when I send or receive some emails.