Ruling on marrying the daughter of one's grandfather

A man married the daughter of his grandfather, and another man married the daughter of his maternal uncle. So what is the status of the one who married the daughter of his grandfather?
The one who married the daughter of his grandfather: she is his aunt, either his paternal aunt or his maternal aunt. If his grandfather is on his father's side, she is his paternal aunt; if his grandfather is on his mother's side, she is his maternal aunt. As for the children of his daughter, they are either the daughters of his maternal aunt or the daughters of his paternal aunt. Marrying the daughters of a paternal aunt or the daughters of a maternal aunt is permissible.