Here's how they are related:
* Ferrets belong to the genus *Mustela*, along with weasels.
* Minks are also in the genus *Mustela*, but a different species than ferrets and weasels.
* All three are mustelids, sharing common features like their elongated bodies, short legs, and sharp claws.
So, you can say that ferrets, weasels, and minks are all "cousins" within the Mustelidae family.