Wow...... you have done your homework and read my page. Yes, he is Irish, he is Thoroughbred cross Connie. He came to England when he was three.
All Thoroughbreds have Arabian blood from way back, 4 Arabians were brought to the UK and were the founders of the Thoroughbred line. I love hot blooded horses.
Both of my daughters ponies are Welsh Mountains and one we have been able to trace his pedigree back to the 1700's! One has Arabian blood too, the other might but we have not been able to trace his pedigree back quite to far.
I am part Irish too, my Grandfather was. I have French, Scottish Jewish and English blood running through my veins.