Question

How can I change Christina (Higert) Eilenberger to correct name: Hilgert?

Answer 1

On her profile page, click the EDIT tab at the top and make your corrections. 

You may have to request to join the Trusted list first  to do any editing.  See this note at the bottom of her profile page:

 

The WikiTree community needs your help with this profile. For complete editing rights request to join this profile's Trusted List. Or simply leave a comment with information.

Answer 2

You can leave a message on the page, or you can send a message to the profile manager with the information that you have, by clicking on "send private message", under the name and date info on Christina's profile page http://www.wikitree.com/wiki/Higert-1

If you've got more shared relatives, you might want to contact the profile manager and talk about collaborating!