Family Finder tests for matches to any of your ancestral lines. Your mitochondrial DNA (mtDNA) haplogroup is specific to your direct maternal line. If you are male, your Y-chromosome DNA (Y-DNA) haplogroup is specific to your direct paternal line. It is normal for your cousins to have mtDNA and Y-DNA haplogroups from their direct maternal and direct paternal lines that are different from your own lines.