Placenamesni.orgthe history behind our place-names

Derrylough, County Down


Ir. Doire Locha ‘oak-wood of the lake’


Derrylough is a small townland of 222 acres and the most northerly townland in the parish of Annaclone.  The interpretation of the name seems clear enough, although there is now no lake visible on the maps.  The queried 16th-century form Deyrloghan, c.1583 (Fiants Eliz. §4327) is more likely to have arisen from the names of two Magennis districts, Deyr (read Deyn) for Loughadian + Loghan for Loughans, on the boundary between Cos Down and Armagh.  The name Derrylough therefore does not appear before 1657 (Derrilagh, Hib. Reg. Up. Iveagh).  Dean Mooney pointed out that Dromnelekawly which is recorded in 1650 in Loughbrickland district in the Inquisitions and Patents seems to substitute for both this name and that of Dooghary in the parish of Seapatrick.  He also thought that if Dooghary were Dubhdhoire ‘black oakwood’ and Derrylough contained the old word loch ‘black’ their current names might have the same meaning (Mooney MS 299).  The townland of Dooghary is slightly further west and, although not now contiguous to Derrylough, could have been in the past.


Muhr, K. (1996): Place-Names of Northern Ireland vol. 6 p. 70

Additional Information

Historical name form

Old FormRef. DateReference

(?) Deyrloghan

1583cFiants Eliz. $4327

Doire loch

1834cMrs Con Magennis (OSNB) E18.172


1834cJ O'D (OSNB) E18.172


1834cOSNB Pron. E18.172

(?) Dromneleckawly Inq. Ult. & CPR Jas I

1950cMooney 1950c 299

Doire Loch "Black Oakwood''

1950cMooney 1950c 300

Doire Locha "Oakwood of the lake''

1950cMooney 1950c 299

Doire Locha

1992PNI 70
Derrilagh1657cHib. Reg. Up. Iveagh
Dereylogh a qr1659cCensus 1659 75
Derrylogh1661BSD 117
Derrylogh1663Sub. Roll Down 276
Derelagh1672cHib. Del. Down
Derrylough1810Wm. Map (OSNB) E18.13, 172
Derrylough1830cBnd. Sur. (OSNB) E18.13, 172
Iveagh Up., Up. Half
Parish in 1851
Place name ID
Place name type