No, it is not unheard of for girls to be named after their mothers and use generational suffixes like 'Jr.' or 'II,' but it is not as common as it is for boys to be named after their fathers. Typically, when daughters are named after their mothers, they are given a different middle name to differentiate between them, and when they get married, they often take their husband's surname, eliminating the need for the generational suffix.