This surname comes from the family of Mouras, a village in Portugal. D. Martin Rodrigues, the Order of Calatrava master was son Vasco Martins S. de Moura, principal gentleman of his time, that was found in the achievements of the Kingdom whose services were the landlord of some places in the Minho province. He had mercy of the commander's residence de Moura that failed to take hold. He married Maria Dias de Gois, daughter of Pedro Salvador and his wife Maria of Esposade. Vasco Martin and his wife being established in Seville in the year 1264, a bond and left generation.

Noble surnames, such as Serrao, come from the ancient homelands of the Spanish people. The original bearer of the Serrao name once lived, held land and was born in the beautiful region of Spain and Portugal. Since this surname means mountain dweller, this family most likely lived in the mountainous regions of Portugal which contains many beautiful ridges and mountains. The Crest is that of the lion which represents that this surname is from a royal surname lineage.