Seeking information on St. Kieran the Younger?

Question

He is a Patron Saint. Can anyone tell me what that means? What might he be a Patron Saint of?

He is reputed to have performed several miracles. Does anyone have information on this?

Below is an example of what I know about him, but I need answers to the questions above.

St. Kieran

Feastday: September 9

St. Kieran was born in Connacht, Ireland. He was the son of Beoit, a carpenter. He studied at St. Finnian's school at Clonard and taught the daughter of the king of Cuala, as he was considered the most learned monk at Clonard. Kieran spent seven years at Inishmore on Aran with St. Enda and then went to a monastery in the center of Ireland called Isel. Forced to leave by the monks because of what they considered his excessive charity, he spent some time on Inis Aingin (Hare Island) and with eight companions, migrated to a spot on the bank of the Shannon river in Offaly, where he built a monastery that became the famous Clonmacnois, reknowned for centuries as the great center of Irish learning, and was its Abbot. Many extravagant miracles and tales are told of Kieran, who is one of the twelve apostles of Ireland. He is often called St. Kieran the Younger to distinguish him from St. Kieran of Saighir. His feast day is September 9

Answer 1

A patron saint of a particular group of people is a saint who has special affinity for that group and its members.  

St. Kieran is one of the patron saints of Dublin, and Glendalough in Ireland.  He is also the patron saint of blackbirds.   Once during Lent, while he held his arms outstretched in prayer, a blackbird laid an egg in the Kevin's hand.  He remained in that position until the baby bird hatched.  You will find information on this at the first site below.  

St. Kieran Catholic Church, Chicago Heights,  IL which is named after Saint Kieran have also adopted him as their patron saint: Their website is the second one below, where you will find more information on some of the miracles St.Kieran is reputed to have performed.

The third site is Clonmacnois which is the monastery which St. Kieran founded.