The same lack of documentary evidence described elsewhere affected records of the 19th Century. No complete censuses or central records of BMD exist for Northern Ireland for this period. However, parish records, land valuations and tombstone records do Exist. In addition we have reached the period when family memories are written down or reliably passed down. Finally death records that do exist from the early 20th Century link back and give some credibility to the non-official records of the previous century.

Records within Roots Ireland show a change of Surname spelling from G to K. Although some Gilkie and Gilky still exist the usual spelling became Kilkey with occasionally Kielkey and rarely Kilkie. It is worth remembering that most people were illilerate and could not spell their names, only say them. It was left to officials, clerks and clergy to interpret spoken names as written names.

The same change from G to K took place in other surnames, for example Gilbride became Kilbride.

The table below shows Roots Ireland records for the period 1800 to 1900

birth	Gillkey	William	1852	Co. Derry
birth	Gillkey	William	1852
birth	Gilkie	Duff	1853	Co. Antrim
Church Marriage	Gilkie	John	1861	Co. Antrim
Church Marriage	Gilkie	William	1862	Co. Antrim
birth	Kielkey	Jane	1864	Co. Derry
birth	Kilkey	Jane	1864	Co. Derry
birth	Kilkey	John	1864	Co. Derry
birth	Kilkey	John	1864	Co. Derry
birth	Kielkey	Catherine	1866	Co. Derry
birth	Kielkey	William	1866	Co. Derry
birth	Kilkie	Catherine	1866	Co. Derry
Church Marriage	Gilkie	James	1868	Co. Derry
birth	Kielkey	William Henry	1870	Co. Derry
birth	Kielky	Ellen	1870	Co. Derry
birth	Kilkey	Susan	1873	Co. Derry
Church Marriage	Kickley	Eliza	1878	Co. Tyrone
Church Marriage	Kilkie	Sarah	1879	Co. Derry
Civil Marriage	Kilkie	Sarah	1879	Co. Derry
Church Marriage	Kilkey	William	1884	Co. Derry
Civil Marriage	Kilkey	William	1884	Co. Derry
birth	Kilkey	William James	1885	Co. Derry
birth	Kilkey	Michael	1886	Co. Derry
Church Marriage	Kelkey	George	1893	Co. Derry
Church Marriage	Kilkey	Bernard	1893	Co. Derry
Civil Marriage	Kilkey	Bernard	1893	Co. Derry
Civil Marriage	Kilkey	George	1893	Co. Derry
birth	Kilkey	Mary	1894
Marriage	Kilkey	Anne	1894	Co. Derry
Church Marriage	Kilkey	Annie	1894	Co. Derry
Civil Marriage	Kilkey	Susan	1894	Co. Derry
Church Marriage	Kilkey	Susan	1894	Co. Derry
birth	Kilkey	Agnes	1896
birth	Kilkey	Hessie	1897
Gravestone	Kilkey	Rose	1898	Co. Derry
Gravestone	Kilkey	Rose	1898	Co. Derry
Gravestone	Kilkey	Agnes	1899	Co. Derry
Gravestone	Kilkey	Agnes	1899	Co. Derry

It is also worth noting that occasional individuals are recorded in Tyrone or Antrim, these are all marriages and births remain stubbornly in Derry.