I'm making a character who is the son of a knight but hated

>>55062739
If his father just assumed it'll be a passing flight of fancy and that he'd be back home in a bit, yes, he would.

If his father decided to disown the son over his idiotic decision to tarnish the family's name by becoming a common adventurer, then no, he wouldn't.

He'd have a courtesy title like "sir" or "lord" or whatever, but he doesn't have any official title until pops kicks the bucket.

>>55062739
Fictional feudal systems vary, but in my mind, no. If his father was a landed knight and he stood to inherit property, that's different.