William had at least one granddaughter , Joan Strang , born of David 's short - lived marriage to the English soprano Dora Labbette .
His sons Ian Strang ( 1886 - 1952 ) and David Strang ( 1887 - 1967 ) were both artists .
William had at least one granddaughter , Joan Strang , born of David Strang 's short - lived marriage to the English soprano Dora Labbette .
His sons Ian Strang ( 1886 - 1952 ) and David Strang ( 1887 - 1967 ) were both artists .