Cobh / An Cobh: from 1849 until 1922 was known as
Queenstown in honour of Queen Victoria.
Dún Laoghaire: the anglicized spelling Dunleary was
used prior to 1821, when the name of the harbour and its surrounding
settlement was changed to Kingstown in honour of King George IV.
The former name persisted for a time as the name of the neighbouring
village, and is recorded as being the name of a station on the Dublin
and Kingstown Railway in 1834. Later, the two communities merged under
the name of Kingstown. In 1921, the original name was restored, but with
the Gaelic spelling which is now used exclusively.
Londonderry / Doire: the town of Derry had the prefix
“London-” added in the early 17th century to mark its close commercial
connections with the capital of England. This remains the name that is
used today for the majority of official purposes, but the variant
Derry is frequently encountered. The “London-” prefix is never
used with the Gaelic spelling.