Info Please on Patrick Doogan OR Dougan Born 1865 6 Donegal

I'd appreciate any information on Patrick Doogan (or Dougan) who was born in Donegal. Ireland in 1865/66. His father was William Doogan who was deceased by May 1886 - the date of Patrick's marriage to Susan Doogan (this is her maiden name co-incidentally). They married in Iskaheen, Donegal.His mother is named as Catherine McNaulty on his death certificate in 1918.