O'Malleys of Clare Island/Westport

My husband and I will be in Ireland in July and were hoping to trace his ancestors, and perhaps meet some relatives is they are still there. We have done a lot of research through records on Ancestry.com, and a family member also gave us a lot of information so thought we knew where his great, and great-great grandparents were from. I was checking the information again, and found some information (DOB) which doesn't make sense with birth dates of children, so now I'm wondering if someone has linked the wrong great great grandparents. Anyway, this is the information I have, and any help you could give would be great.

I question whether Austin and Honor are correctly identified as the great-great grandparents, or whether their, or their children's birth dates are wrong.

Austin O'Malley (b. abt 1950 Clare Island, d. Nov 24, 1916 Chicago) married to:                                                                             Honor O'Malley/nee O'Malley (b. abt 1952 Mayo, d. Jan 11, 1908 Chicago)

Immigrated to US between 1880 and 1882 with the following children:

Kathryn O'Malley (b. unknown - d. Aug 19, 1963 Chicago) m. Craft                                                

Owen O'Malley (b. unknown - d. Jan 17, 1916 Chicago)

Annie (M.?) O'Malley (b. abt. 1862 Mayo, Ireland - d. April 9, 1908 Chicago)                                                                                            Married Edward J. O'Malley (b. abt 1861 Mayo?, d. Nov 16, 1935 Chicago) m. Jan 23, 1886                                        Annie and Edward J. are my husband's great-grandparents - we have no other information about Edward J.

John O'Malley (b. abt. 1870 Westport, Mayo d. Nov 28, 1930 Chicago)

Mary O'Malley (b. July  12, 1874 Mayo, d. Aug 13, 1933)

Edward O'Malley (b. abt 1876 Ireland, d. July 25, 1945

Sarah O'Malley (b. abt 1880 - may have been born in US) m. Martin O'Malley