The Moors were the Muslims who lived in the Maghreb and on the Iberian Peninsula, Sicily and parts of Southern France in the Middle Ages. In Europe, the word was often used for indigenous European people whose ancestors were converted to Islam.
The Umayyad Dynasty came to Iberia from Syria. Many of them came to what is now Spain and Portugal. They had a very big influence on the culture of these countries.
Umayyad Muslims were the ones who captured and named Al-Andalus, which means land of the Vandals. The majority of Moors in Iberia were native European populations who converted to Islam due to the Arab conquests of the peninsula. These Moors were forcefully converted to Catholicism after the Christian reconquest of the Iberian Peninsula in completion of the period popularly known as the Reconquista.