 Doug Sr. was the patriarch of an extraordinary rugby union dynasty with three of his sons and three of his grandsons also playing for Australia.His sons Doug McLean Jr., Bill McLean, and Jack McLean were Wallabies, with Doug Jr. also one of Australia's Dual-code rugby internationals.A fourth son Bob had two sons who represented for Australian in rugby union – Jeff McLean and Paul McLean, along with their cousin Peter McLean (Bill's son).