Ascaill an Teampaill - - Church Avenue literally "the avenue of the church".
This is a good example of the tuiseal ginideach

AN TUISEAL GINIDEACH

What is an tuiseal ginideach?

• It is the form of the noun which expresses possession where" 's " or "of" is used in English. Scéal Sheáin - - John's story; gloine na fuinneoige - - the glass of the window; muintir na cathrach - - the people of the city. Where two nouns occur together in Irish the second is (generally) in the tuiseal ginideach. (Beware there are exceptions where it is not used!)
  
  Many placenames show the tuiseal ginideach:
  Cluain Meala - - A meadow of honey (Clonmel);
  Cill Dara - - A church of oak (Kildare);
  Dún na nGall - - The fortress of the foreigners (Donegal)
  {If only to appreciate these we should learn more Irish}

• The tuiseal ginideach occurs after the réamhfhocal comhshuite - - compound preposition:
  Examples:
  os cionn na fuinneoige - - over the window;
  os comhair an tí - - in front of the house;
  le hais an bhóthair - - alongside the road.
  (Beware there are exceptions where it is not used!)

• The tuiseal ginideach occurs after the ainm briathartha - - the verbal noun
  ag deisiú an chairr - - repairing the car
  ag scríobh litre - - writing a letter
  ag lorg oibre - - looking for work
  (Beware there are exceptions where it is not used!)
  
• The tuiseal ginideach occurs after these words: timpeall, chun, trasna, cois, mórán, beagán, alán.
  
  timpeall na tíre - - around the country
  chun cinn - - ahead
  trasna an bhóthair - - across the road
  cois abhann - - beside a river
  mórán ama - - much time
  beagán oibre - - a little work
  alán airgid - - a lot of money
  
  

The next page will be on Na Díoclaontaí - - The Declensions and how to form the tuiseal ginideach with and without an t-alt in each of the five declensions