I don't remember the author and all I remember of the title is Pa.  I think that might be the entire title but I'm not sure. I've searched just using Pa and got nowhere.  What I remember of the story is a plain-spoken man who raises several children alone after his wife dies. I believe there are five children, three boys (two of them twins) and two girls (the youngest by his second wife).  He is involved in oil, I believe, and everyone believes he's rich, but his real wealth is in his family and his friends.  Does that sound familiar to anyone?

This is an older book, so I may be posting in the wrong forum.  I couldn't find a general fiction forum.