Thanks, Janet.
You are, of course, right. As Jessica Kramer says on page 29 of her dissertation:-
Typically the inscription would begin with Dis Manibus or DM, which translated means, “to the spirits of the departed.”78 This would be followed by the name of the soldier, then his father’s name.
This gives one generation.
I took the view that if someone in the future were to find my memorial with "Steve Bartlett son of Wilf Bartlett" it would at the very minimal limit of what would be regarded as a genealogical memorial.