BS”D
Is there a rov who has written a kesuba there beforehand? He would be the best person to ask.
Otherwise, contact a Chabad shaliach and see if he can find out whether the Rebbe ZYA addressed a letter to someone in Cambridge and if so, how it was spelled in the letter. I’m blanking out on how to check or I would offer to do it for you. Then again, that would be a Yiddish based spelling and I am not sure if that would necessarily be correct for a kesuba either.