Disturbing other people with what he saw as his great weakness, his inability to suppress everything that had happened to him and pretend that it hadn't, was more harrowing to Theo than actually reliving what he'd gone through every night. He would rather have screamed and thrashed and sobbed in his sleep to himself than woken anyone else up and it being someone he knew never made it any better, just made the guilt worse.
He both did and didn't hear his name called through the horror of his slumber, his father having only addressed him by his full name on rare occasions and more commonly referred to him as 'boy' or 'child', just an interchangeable descriptor for the heir who so disappointed him. The screaming cut off like someone had slapped a hand over Theo's mouth but he wasn't fully awake, pressed back as small as he could make himself and almost hyperventilating quietly to himself, every muscle piano-wire tense.