O’SHANNON, O Shanahan, Gilshenan, Giltenan
The Gaelic names of three distinct Irish families became anglicized as
Shannon or
O’Shannon. First there is O' Seanáin (descendant of Senan, a
personal name) of which we
know little beyond the fact that it was associated
with Counties Carlow and Wexford,
where, however, the name is now rare.
Another derivation from the same personal name is
Mac Giolla t-Seanáin (son of the follower of St. Senan), which, though normally
anglicized Giltenan, has become Shannon in County Clare. The cognate Mac Giolla
Seanáin anglicized Gilshenan
etc., the name of a Tyrone-Fermanagh sept, is not rendered
Shannon in recent
times; but the census of 1659 (in which prefixes Mac and O were often
confused)
gives O’Seanan as one of the principal Irish names in the district around
Enniskillen,
County Fermanagh, at that date. A further complication arises insomuch
as
in County Clare, where, with Belfast, the name Shannon is found most
plentifully, it is
a synonym of Shanahan (in Irish O' Seanacháin). This
is a case of contraction due to
English influence: English surveyors and
law clerks (being like many English of the
present day inclined to silence
an internal H) at the time of the Act of Settlement and
again after the
Williamite confiscations wrote down Irish names as nearly as they could
phonetically, hence Shanahan was recorded Shannon
The
O’Shanahans were a Dalcassian sept of sufficient importance to have a
recognized
chief in early time: of the clan Ui Bloid, his territory lay
between Bodyke and Feakle
in County Clare where the name still survives; but in the year 1318 he and his
followers were dispossessed by the MacNamaras
and in the fourteenth century they became
dispersed all over Munster. Curiously
enough, though one would expect less foreign
influence in the west, the
form Shannon is normal in Clare, but Shanahan is commoner in
the other
Munster counties. The total number of births recorded is approximately
the
same for Shannon and Shanahan (i.e. sixty per year each).
It should be noted that the surname Shannon is unconnected with the name of the
principal river in Ireland.
The name does not appear frequently in the history of the country or among its
notabilities in the cultural sphere. The well known London portrait
painter Charles
Shannon (1863-1877), was presumably of Irish extraction.
A prominent Labour leader and
writer in our own day is Cathal O’Shannon, and, in America, Wilson Shannon, the
governor of Ohio, made his mark as lawyer and diplomat.