The Viscacha, an animal known for always looking like they need a nap, is not actually related to rabbits

They resemble rabbits due to convergent evolution

Viscacha or vizcacha (UK: /vɪˈskætʃə/, US: /vɪˈskɑːtʃə/) are rodents of two genera (Lagidium and Lagostomus) in the family Chinchillidae. They are native to South America and convergently resemble rabbits

https://en.wikipedia.org/wiki/Viscacha