Muhammad
Muhammad's life is traditionally defined into two periods: pre-hijra (emigration) in Mecca (from 570 to 622), and post-hijra in Medina (from 622 until 632). Muhammad is said to have had thirteen wives in total (although two have ambiguous accounts, Rayhana bint Zayd and Maria al-Qibtiyya, as wife or concubine.) Eleven of the thirteen marriages occurred after the migration to Medina.
Women in Islam
Polyandry, the practice of a woman having more than one husband (even temporarily, after payment of a sum of money to the man or the man's family), by contrast, is not permitted.
The Prophet Muḥammad quite deliberately did not recommend cousin-marriage as his "sunnah" or path to be followed; out of his thirteen wives, only one – the seventh, Zaynab bint Jaish, a divorceé said by historians to have been very beautiful – was his cousin. The rest of his wives came from diverse social and even religious backgrounds, with Safiyya bint Huyayy and Raihana bint Shamum being of Jewish origin.