McDonnell Brothers

I am in search of information regarding
Michael McDonnell born in 1888. Attached is Michael’s birth record. We know that he was alive in 1935.
John McDonnell born in 1892
Patrick McDonnell born in 1899
I have been told by two different branches of our family that one or more of the brothers Michael, John and Patrick McDonnell died in a fishing boat accident.
Their parents were Patrick McDonnell (1851-1907) and Margaret Coyne (1853-1935). They were Roman Catholic. Their sisters names are Mary O’Malley(1881-1918), Bridget Murphy (1882-1937), Anna Conroy(1883-1955), Margaret Simmons (1886-1967), Catherine O’Malley(1887-1942), Julia Finn (1896-1889) and Honor McDonnell (1890-) We do not know if the brothers were married. We have excellent documentation on 6 of their sisters, but very few documents regarding these brothers or their sister Honor.
Thank you for your time and assistance you may be able to provide. Please email me at [email protected]
Kathleen Carr