'Andalusian' originates from 'Andalusia', a region in Spain, specifically from the Arabic word 'Al-Andalus', which referred to Muslim-ruled territories in the Iberian Peninsula.

'Al-Andalus' transformed into the Spanish word 'Andalucía', and eventually became the modern English word 'Andalusian'.

Initially, it referred to the Muslim territories in Spain, but over time it evolved to denote anything related to the region of Andalusia.