The term 'relative of a weasel' can refer to three different animals: the MINK, SABLE, and STOAT. The MINK is a semi-aquatic mammal that is native to North America and Europe. It is closely related to the weasel and has a long, slender body and short legs. The SABLE is a species of marten that is found in northern Asia and parts of Europe. It is also related to the weasel and has a thick fur coat that is prized for its softness and warmth. The STOAT is a species of weasel that is found in Eurasia and North America. It is known for its long, slender body and reddish-brown fur. All three of these animals are related to the weasel and share many of its characteristics.