Rolf Scamander was a magizoologist and the grandson of Newt Scamander and his wife Porpentina. He married fellow naturalist Luna Lovegood, and the couple had twin sons named Lorcan and Lysander. Rolf studied at the Hogwarts School of Witchcraft and Wizardry from 1992 to 1999 and was sorted to Hufflepuff like his grandfather. During his years at Hogwarts he always showed aptitude for Care of Magical Creatures, considering Hagrid as one of the best professors of Hogwarts, and Herbology. After graduating from school and the war, Rolf met Luna at a congress of naturalists and magizoologists and was enchanted by her. They married in 2006 and had Lorcan and Lysander at the end of 2008.
Luna is Rolf's wife, and they presumably met out of Hogwarts. They are both naturalists