Euca? Tan? Granted I'm on Android only, but I don't know these names.
Tan is Phillip’s Surname, and Euca is the protag’s Default name. Idk, maybe it was changed during developement at one point? :/
Well, I found out Phillips last name is Tan on the fanmade wiki, which could be an error. But I swear I heard his surname mentioned somewhere in game, maybe I’m just halucenating. (Edit, I think it was towards the begining)