Setanta Sports in Ireland has now rebranded to Eir Sport. Setanta Sports Ireland is now Eir Sport 1 whilst Setanta Sports 1 is now Eir Sport 2.
http://www.eirsport.ie/discover-eir-sport
The only two businesses remaining under the Setanta Sports brand are Setanta Sports Eurasia and Setanta Sports Asia. Setanta Sports Eurasia is still Irish-owned whilst Setanta Sports Asia is owned by Discovery. I guess it's likely that Discovery would merge it with its Eurosport brand in the future.
Premier Sports which shared its satellite stream with Setanta Sports 1 will presumably share its satellite stream with Eir Sport 2.