The Isle of Bute, known as Bute, is an island in the Firth of Clyde in Scotland, United Kingdom. It is separated into highland and lowland areas by the Highland Boundary Fault. Previously a basic island of the bigger Region of Bute, it is now part of the council location of Argyll and also Bute. Bute's resident population was 6,498 in 2011, a decrease of simply over 10% from the figure of 7,228 recorded in 2001 versus a background of Scottish island populations as a whole growing by 4% to 103,702 for the very same period. The name "Bute" is of unpredictable origin. Watson as well as Mac an Tàilleir support a derivation from Old Irish bót ("fire"), possibly of signal fires. This reference to beacon fires might date from the Viking duration, when the island was most likely recognized to the Norse as Bót. Other possible derivations include Brythonic budh ("corn"), "success", St Brendan, or both, his reclusive cell. There is no likely derivation from Ptolemy's Ebudae. The island was also understood during the Viking era as Rothesay, possibly referring to the personal name Roth or Roderick as well as the Old Norse suffix ey ("island"). This name was at some point taken by the major community on the island, whose Gaelic name is Baile Bhòid ("community of Bute").