 Dr. Ruy d 'Andrade gave the breed their name of " Sorraia " . D 'Andrade took the name from the Sorraia River in Portugal . The breed had previously been known by the local Portuguese as " zebro " or " zebra " , due to their markings . In the time of Christopher Columbus , the Sorraia was also known as the Marismeño , but the Sorraia and the Marismeño have evolved into two different breeds over time . Today , the name Marismeño refers to a population of semiferal horses living in Doñana Natural Park in Spain . 
 Dr. Ruy d 'Andrade gave the breed their name of " Sorraia " . D 'Andrade took the name from the Sorraia River in Portugal . The breed <a href='been_done' title='1'><mark>had</mark></a> previously been known by the local Portuguese as " zebro " or " zebra " , due to their markings . In the time of Christopher Columbus , the Sorraia was also known as the Marismeño , but the Sorraia and the Marismeño <a href='been_done' title='2'><mark>have</mark></a> evolved into two different breeds over time . Today , the name Marismeño <a href='uninflect' title='3'><mark>refers</mark></a> to a population of semiferal horses living in Doñana Natural Park in Spain . 
Dr. Ruy d 'Andrade gave the breed their name of " Sorraia " . D 'Andrade took da name from tdaSorraia River in Portugal . Thdareed done previously been known by the local Portuguese as " zebro " or " zebra " , due to their markings . In the time of Christopher Columbus , the Sorraia was also known as thedarismeño , but the daraia and the Marismeño done evolved into 2 diff breeds over time . Today , the name Marismeño refer to a population of semiferal horses living in Doñana Natural Park in Spain .