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CIIC 292. Knockboy I, Co. Waterford

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© 2016-06-01

© 2017-06-22

National Monuments Service Record Number: WA013-034006-

Site Type

Ecclesiastical (probably early)



The parish church of Seskinan (WA013-034001-) was probably built on the site of an earlier church. There were traces of an ecclesiastical enclosure in the field to the S and within the graveyard (Brash 1868-9, 127; Power 1898, 84), but this is no longer evident. There is also the site of Toberatemple Well (WA013-032001-) c. 250m to the W (Power 1898, 83). The church is an undifferentiated structure (int. dims. 22.2m E-W; 7.55m N-S) surviving complete (H of long walls c. 2.1-2.5m) with quoins and a double bellcote (now damaged) over the W gable. There are pointed doorways towards the W end of the N and S walls, with a stoup inside the S doorway and an aumbry at the E end of the S wall. Two ogee-headed windows, one above the other, are in the W gable, with another in the E wall, and there are two simple lights towards the E end of the long walls. All the embrasures are lintelled internally except the E window which has a flat arch of dressed voussoirs and ingoings. The square base of a font (WA013-034004-) is also located within the church (Power 1898, 83).

All of the lintels, except one over the N doorway, have ogham inscriptions (Brash 1868-9, 118-30; Macalister 1945, 286-9), and a seventh ogham stone is standing in the NW corner of the church. An eighth ogham stone, said to have also originated here, was recorded by Macalister (1907, 213; 1945, 289) at Salterbridge House, near Cappoquin prior to 1907 but it was missing when he returned in 1940.


1.78m x 0.56m x 0.23m (converted from Macalister 1945, 286). This is the inner lintel of the window at the E end of the N wall.


'chiselled on two angles (up-down) beginning on the right-hand edge, on the face turned toward the inside of the church... There is nothing remaining before the present initial E. The B-surface having been chipped away, the bracketed letters, as well as the B-half of the R, have disappeared' (Macalister 1945, 286).


[  ̣  ̣ ?   ̣  ̣]ER[A]T[I] M[U]C[OI] NETA-S/[EGAM]ONAS


'...? descendant of Nad-Segamon'


  • The kindred or sept name NETA-SEGAMONAS consists of the element Nad- 'sister's son, champion' and a personal name Segamon (McManus 1991, pp 109-10, 112). One theory is that this may be the Gaulish name Segomo (McManus 1991, 179 n. 46). It is noteworthy that a Nia-Segamon is listed in the historical sources as a prehistoric king of Cashel (Bhreathnach 2014, 43-4). The fact that MUCOI NETA-SEGAMONAS '(of) the descendant of Nad/Nia-Segamon' is also found on an ogham stone at nearby Ardmore I (CIIC. 263) and at Island (CIIC. 300) may suggest that this was a dynasty which controlled the area of west Waterford in the 5th century.



Acting as inner lintel of the north window, next to the east gable, of the ruin of Seskinan parish church (Macalister 1945, 286) in the townland of Knockboy and barony of Decies without Drum.


Find location possibly close to original site

Last Recorded

Still acting as lintel over the north window of the church at Knockboy. The lintel and surrounding wall underwent urgent stabilisation work by Tom Pollard and his team in 2019 as part of the Knockboy Conservation Project, thanks to funding and support from the Heritage Office at Waterford County Council, the Heritage Council, the National Monuments Service and the Adopt a Monument Scheme. The location of this stone may be accessed via the National Monuments Service Historic Environment viewer on www.archaeology.ie. (Publicly accessible. GPS coordinates -7.684857, 52.194802)

History of Recording

discovered in 1851 by G. V. du Noyer (Macalister 1945, 286). This and the six other ogham stones on site were recorded in 3d using photogrammetry by Simon Dowling, thanks to funding from the Heritage Council and support from Waterford County Council and Adopt a Monument Ireland Scheme.


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