According to the Big Bang Theory wiki Penny's father is named Wyatt and is seen in The Boyfriend Complexity. He doesn't appear to be an intellectual.
have you not seen that episode? it centers around the visit from her father and how he likes Leonard because he's smarter than the other guys Penny's dated. (Boyfriend Complexity, Season 4).
Yeah, but the bar wasn't set very high. Her past bf's were real scumbags. His main goal was for his grandkids to not end up living in a trailer. Not exactly too intellectual.
Not exactly setting the bar high for her, which explains Penny's issues and realtionships with Men.