Complex sentence: It debuted on 16 May 1962, under its original name but was renamed on 13 June 1962, to "The Boss Cat", which was shortened on 22 February 1967, to "Boss Cat".
Split into simpler sentences: It debuted on 16 May 1962, under its original name but was renamed "The Boss Cat" on 13 June 1962. This was shortened on 22 February 1967 to "Boss Cat".