( The DH in this name is pronounced like a hardened 'th' in 'brother'. )
Maadhavi was daughter of a famous king Yayaathi who was an ancestor of Paandavas. When Vishvaamithra's disciple Gaalava came to him with Garuda and asked for eight hundred white horses all with one black ear. Yayaathi pleaded inability and in stead entrusted his daughter Maadhavi to be offered to any other king that can meet the demand. Gaalava took her with him and offered to three kings, one after the other , on the condition that she should be returned after begetting one son from her. Accordingly, she bore three sons, one each, to four kings viz. 1)Vasumanas to king Haryashva of Ayodhya , 2) Shibi to King Usheenara of the Usheenara lands and 3) Prathardana to King Divodaasa of Kaashi. Unable to find another king with the required hoeses, Gaalava offerred Maadhavi to Vishvaamithra in lieu of the shortage of te horses, to beget a son from her. Vishvaamithra begot a son Ashtaka from her and returned the girl to Gaalava who entrusted her back to her father. Thus Maadhavi gave four sons to four great lineages.
Maadhavi did not marry further. She took to penance. She lived an austere and ascetic life in the forests. She went to the place where her four sons were performing a sacrifice at Nymisha forest. At the same time, her father Yayaathi was expelled from the heaven and fell down to the earth at the same place. Incidentally, Gaalava too went there at the same instance. She and her four sons donated their penances to Yayaathi for seeing him again in heaven. Gaalava too, as a matter of gratitude, donated one-eighth of his penances to Yayaathi and helped him regain his place in the heaven.
Though it seems ridicilous for us that a woman married many men in turns, those were the powers of people of those standards those days code of those days accorded such practice.