Regarding Clonshambo in the Parish of Kilcock, Dr. Comerford tells us:
Cluain-seann-both, i.e., "the meadow of the old tent or hut"); this parish may have derived its name from the hermit’s cell of one of the saints who made it their abode. St. Garbhan, brother of St. Kevin of Glendalough, was culted here on the 14th of May. In the Life of St. Kevin it is related that at one time he was inclined to wander about as a pilgrim, but St. Garbhan (probably of Clonshanbo) prevented him by observing that "it was not by flying, birds hatched their eggs.
The patron saint of this district is St. German; the parochial register has "Parochia Sti. Germani de Clonshanbo;" and in Bishop MacGeoghegan’s list of parish churches, compiled about 1640, we find Ecclesia Sti. Germani de Cluenseannbo set down.
Which of the saints of that name was patron here it is not easy to determine. St. Patrick having preached the Gospel in this locality, gives probability to the supposition, that St. German, Bishop of Auxerre, the great spiritual guide under whose direction our National Saint prepared himself for the future Apostleship of Ireland, some say, for 14 years, others, for so many as 30 years, - is meant. Another opinion is that St. German, nephew of St. Patrick, who helped him in his missionary labours, and was afterwards the first Bishop of the Isle of Man, was the saint honoured at Clonshanbo. There is yet another theory on this subject. In the Life of St. Ciaran of Saighar, mention is made of a holy hermit named Geaman, or Gemman, who is called German by Colgan, and is identical with a bard of that name "who lived in Leinster, near the confines of Meath."
It is related that St. Columba, after receiving the Holy Order of Deaconship in the monastery of St. Finian of Mohill, set out for Leinster, and became a pupil of this Gemman, then advanced in years, and after passing some time with him, he entered the monastic school of Clonard (Loca. Patr., p.298). Between these three the choice seems to lie. The second-name is honoured in the Martyrology of Tallaght, at the 30th of July: German MacGuill."
Regarding Athgarvan in the Parish of Newbridge, he also relates
Father Shearman (Loca Patr. Gen. Tab. 10p.180) surmises that the name of this place may be derived from St. Garbhan (Ath-Garbhan, i.e., “the Ford of Garbhan”), nephew of St. Finnan of Clonard, and kinsman of St. Kevin of Glendalough. This Saint, whose feast was assigned to May 14th, was identified also with Clonshambo, as already stated in the Paper on Kilcock."
St. Garbhan of Clonshambo and Athgarvan, pray for us!