On a previous thread you initiated it is stated that the will of WHS, Master Mariner, Poole, mentions children Janet Mary and Howard John.
Again, I am speculating.
A John Howard Summers was born Apl-Jun1839, St George in the East, Middx. Mmn Tweddie. He died in Liverpool, aged 2, in 1841. (GRO Index)
Marriage 18 May 1834. St Peter's, Liverpool. William Henry Summers, mariner, and Anniple Tweedie.Sorry, cannot give you the link. Just Google.