Thank you @ladysweettart I'll give that a try and see if it amends my situation. The lot still bears it's correct name, but I discovered the problem when I decided to have their wedding at their castle. It still says Grayson Castle, but in the Event menu it's listed as a Cantrell household. Should be Talek Sen Dene. Face/palm. I already have two Cantrell households as the eldest son just moved out! This could get really confusing, really fast.
UPDATE: @ladysweettart It Worked! Thank you for helping me salvage my game save! The husband still bore his surname. I changed his wife's surname to his in CAS and in Manage Worlds I changed the name of the household on their lot to Talek Sen Dene. Then I picked up where I'd left off. Thank you, thank you, thank you!
