The muggleborns went to Gringotts, in order to test themselves, if they were descending from the magical families here in Great Britain. There were some, who were coming from the magical families, who lived here in the magical world like Justin Finch-Fletchley, who is descending from the Smith and MacMillan families. And there were Colin and Dennis, who were coming from the Nott and the Lovegood families. Justin and the Creevey brothers were welcomed in their magical families and Tarquinius and Pandora welcomed the children with open arms. Theodore always dreamed of a little brother and Colin and Dennis were perfect. Luna liked Colin since he was in the same class like her and Dennis was a perfect little brother in her opinion. They had protections from the house Nott and Lovegood.