See: Islands of the lower Firth of Clyde, Firth of Clyde Forum[?]
Towns and villages along the shoreline
... average family size is 3.67. In the town the population is spread out with 30.3% under the age of 18, 8.1% from 18 to 24, 29.9% from 25 to 44, 23.8% from 45 to 64, and 7.9% ...