Birth registration: Eleanor Mary Montgomery Oct./Dec.1880 Hackney district volume 1b page 488.
1881 census- 20 Jenner Rd., Hackney
William J. Montgomery, 39, Belfast, Com.m Agent in _ Merchandise. Wife Eleanor N.? Montgomery, 30, Belfast. Children- William O. Montgomery, 4. Robert E. Montgomery 2. Eleanor M. Montgomery 5 months- all born Stoke Newington, Middlesex. Also 15 year old female servant.
1891 census- (not sure of address) Hackney
William J. Montgomery, 49, Belfast, commission agent + preacher of the Gospel. Wife Eleanor N.? Montgomery, 40, Belfast. William O. Montgomery, 14, shipping merchants clerk. Robert E, Montgomery, 12. Eleanor M. Montgomery, 10. Lucy F. Montgomery, 8. Arthur H. Montgomery, 6. All children born Stoke Newington. Also 1 boarder.
1901 census- 35 Alfred St., Acton
William J. Montgomery, 60, dealer + shipper, Ireland. Wife Eleonor H.? Montgomery, 51, Ireland. Children (all born Hackney): William O. Montgomery, 24, drapery buyers assistant; Robert E. Montgomery, 22, civil service clerk (2nd div.); Lucy F. Montgomery, 18, girl clerk G.P.O; Arthur H. Montgomery, 16, boy ___.
Birth registrations:
William Oswald Montgomery Oct./Dec.1876 Hackney district vol. 1b p.483
Robert Ernest Montgomery July/Sept.1878 Hackney vol. 1b p.506
Lucy Florence Montgomery Apr./June 1882 Hackney vol. 1b p.494
Arthur Hugh Jan./Mar.1884 Chelsea vol. 1a p.404
Death registrations:
Eleanor H. Montgomery (age 83) Jan./Mar.1933 Brentford district vol. 3a p.294 (possibly Wm. J.'s wife?)
Eleanor Oswald Montgomery (age 75) Oct./Dec.1886 Hackney vol. 1b p.271 (I listed this one becuase it's in Hackney district and eldest son's middle name Oswald but perhaps no connection)