The leadership of southern unionism was dominated by wealthy, well-educated men who wanted to live in Ireland, felt British and Irish, and who had Irish roots. Many were members of the privileged Anglo-Irish class, who valued their cultural affiliations with the British Empire, and had close personal connections to the aristocracy in Britain. This led to their pejorative description by some opponents as "West Brits". They were generally members of the Anglican Church of Ireland, although there were several notable Catholic unionists, such as The 5th Earl of Kenmare, and Sir Antony MacDonnell. Many of the IUA's leading figures were associated with the Kildare Street Club, a gentleman's club in Dublin. The electoral support base of the IUA in southern Ireland was largely drawn from its Protestant population, many of whom were farmers, small business owners or Church of Ireland clergymen. In 1913, the IUA had a southern core of 683 members, with approximately 300,000 supporters spread across the three southern provinces. In March 1919 Sir Maurice Dockrell told the House of Commons that the supporting population was "about 350,000". The IUA never achieved "mass party" status in the south. Its local branches varied in strength, and generally followed geographic patterns of Protestant population density. As a result, the IUA's support base was severely limited to certain sections of the population, described as usually being "Protestant, anglicised, propertied and aristocratic".