Clearly, multiple wives exist on halakha, but what about real life?
Tosefta Ketubot 5:1 : R Tarfon engaged 300 women eat terumah during hunger. (on this note, one of my relatives engaged or faked marriages with several women to take them to the safer side of the war front during WW1)
Tosefta Yevamot – saus 2 families of cohanim come from tzaros
Yerushalmi Tevamot mentions R Yehuda HaNasi telling one brother to do yibum to 12 sisters-in-law
Agrippa
Raban Gamliel II (through yibum)
Archeology: found a ~ 440 BCE ketubah saying that the husband agrees not to take 2nd wife
source: Goldfeder, Mark. “The story of Jewish polygamy.” Columbia Journal of Gender and Law, vol. 26, no. 2, 22 Oct. 2013,