William Colquhoun (born 1750) (b. 1750) Parents Sir James Colquhoun of Luss, 1st Bt. Helen Sutherland Children Siblings Janet Colquhoun Sir James Colquhoun of Luss, 2nd Bt. Ann Sutherland Colquhoun Margaret Colquhoun Catherine Colquhoun Helen Colquhoun Ludovic Colquhoun