@girish Thank you for your help. I Found the LOCAL_DOMAIN was in a filed called env.production. I had to install "locate" command in terminal on digital ocean. Thats how I found it. Not sure if its sitting "above" the cloudron stuff in the directory tree.
Made and commented the change in LOCAL_DOMAIN. and will restart the server. We only have 3 users. Things appear fine on the site. Names changed as I wanted, however... I'll have to see if there are any unknown ramifications.