Edward's wife was Agnes Jane Joanna Jackson.
There are some baptisms in Ashington Holy Sepulcre for this family.
Robert Jackson Rowell baptised 2 Jan 1898, buried 5 Jan 1898, age 21 days son of Edward and Agnes Jane Joanna Rowell, bicycle-maker, Ashington
Jane Elizabeth Rowell baptised 30 Dec 1900 d/o Edward and Joanna, Cycle maker, Ashington. This is probably Jennie.
Edward Rowell [Sr] was buried 7 Sep 1910 age 69 of 15 Cross Row [there are several memorials to him in the Morpeth newspaper from his wife and family]
Elizabeth Rowell buried 28 Jan 1917, age 65 of 15 Cross Row. Elizabeth was baptised in Ashington as age "Riper Years" 29 May 1911. It did not include her parents names or her maiden name.
These were the only Rowells that I knew for sure is your family. There is birth a registered in Berwick with last name Rowell and mother's maiden name of Jackson--John Wilson Rowell 1905. Two more registered in Morpeth with MMN Jackson--John Robert Rowell 1909 and Eliza Jane Rowell 1910.
Janis