THe McLennan Family in Glasgow in the 1860s: identified are, back row, left to right, William with dark hair and beard, and to his left and balding, James Bowman, William's brother-in-law and at one time his business partner, and at the end in profile, James Bowman's wife and William's sister.
Seated in the front row, behind the table, Donald McLennan, Kenneth's younger brother, and to his left, possibly Janet McLennan, Kenneth and Donald's sister.
The rest are certainly all either William's sisters and spouses, or perhaps Donald's children. Sadly we will never know.
From Seatons and McLennans of Glasgow, Scotland and the U.S.