Hello Meka
Yes, a very large number of relatives. John Hogan, husband of Mary Gertrude Seery, was one of 11 children, most of whom married and had large families also. I don't know of any twins among the second generation, i.e. John and Mary Hogan's grandchildren, but in the third generation I have identical twin cousins.
Hogan children:
John Joseph Hogan married Margaret Charles: Mary, William, John, Joseph, Margaret, Kathleen.
James Hogan married Martha Cowan: Janet
Thomas Hogan did not marry
Patrick, Edward and Martin Hogan died as infants.
Alice Hogan married Edmund Balfe: Noel
Kathleen and Margaret Hogan did not marry.
Mary Cecilia Hogan married James Sullivan: John (my father), Brian, Desmond, Kevin and Noel.
The other feature of the Hogan family is the determination not to let good names go to waste, which is very confusing looking at the multitudes of Mary, Margaret, Catherine, Alice, John, James etc.
I am handicapped by the date limits of the Qld RBDM so I don't know very much about the later generations of the Hogan family.
Regards
EllenS