William Henry Biddulph was the sixth son of Francis Edward Biddulph, and his wife Annabella. He was born on the 20th of October 1870 at 17 Montpelier Hill, Arbour Hill, Stoneybatter, Dublin. He was baptised on the 19th of December 1870 in the Church of Ireland Parish of St. Paul, in the City of Dublin.
His father, Francis, was a Captain in H.M. 9th Regiment of Foot.
He died at Pembroke Dock, Wales, in 1875.
Deaths. At Pembroke Dock, on the 5th inst., Edith,aged 3 years, and on the 6th Wiliiam, aged 4 years, same day, Isabella, aged 1 year, the dearly beloved children of Capt. Biddulph. 1st Bat., 9th Regiment.
William is not buried in the Military Cemetery of St. John's Pembroke Dock but in the civil cemetery with his siblings.