Drostan - also known as Drustan or Dunstan - was a protégé of St Columcille and accompanied him on his Christian crusade to Scotland in the 6th century.

When Columcille returned to Iona, he left Drostan behind to continue the good work. Drostan visited Aberlour, where he baptised Christian converts in a spring on the site of what is now the Aberlour Distillery. An engraved weather-beaten stone, which for years marked the exact spot of St Drostan's Well, has been carefully preserved at the distillery.

Drostan stayed in the area for some years, becoming abbot of a monastery near Aberdeen. Later, seeking a life of even greater seclusion, he became a hermit and a spiritual inspiration to the sick and the poor. A number of miracles are attributed to him, including the restoration of sight to a blind monk.

Some would say that the pure spring water of St Drostan's Well, the lifeblood of Aberlour malt whisky, is another of the saint's miracles.