His name comes from his daughter's death certificate.

Clare Journal Feb 1 1838
Marriage
At the residence of her uncle, Mr. C. Hickey, merchant, High Street, Miss
Mary Garrahy, to Michael Gregg, shopkeeper, Mill Street.

THE CONNAUGHT JOURNAL
THURSDAY, OCTOBER 8,  1840
THE INQUEST
     On Thursday, at three o'clock precisely, Robert George Greene, Esq. Coroner, accompanied by several magistrates, took his seat on the Bench. The court was densely crowded in all its parts, and the greatest anxiety was evinced to hear the proceedings. Cawte, Garden and Hurst, were then placed at the bar; the last did not retain so much of the stern ferocity of appearance and demeanor as distinguished him on the proceeding day. The following jury, whom the Coroner had specially summoned for the purpose: John Bonyage, Michael Finucane, Michael Kerin, John Cullinan, James Leech, Edward Gallery, William Lardner, sen., William Molony, Cornelius Hickey, Michael Gregg, John Keane, and James Kelly.

Slater's Directory, 1846
Ennis Linen Drapers and Haberdashers
(Marked thus * are also Woollen Drapers.)
*Gregg, Michael, High st.