The UK Parliament constituency of County Galway was an historic Irish constituency, comprised the whole of County Galway, except for the Borough of Galway. It replaced the pre-Act of Union Parliament of Ireland constituency. Its representatives sat in the British House of Commons.
some of the represenitives were of the house of commons
I think it is neither definitely correct nor definitely incorrect by adding the word some, by saying some that is correct because some were but it is incorrect because the passage leads you to believe all of the representatives were members