Its name comes from the Scottish Gaelic, Innis nam Biocaire, meaning Isle of the Vicars, implying that there may have been an old ecclesiastical or Culdee settlement here, as in nearby Inchcolm.
", playing on a pun on 'Inch' (Innis), the Gaelic word for island, and inch, the imperial measurement.
Although the island is now uninhabited much of this concrete superstructure remains largely intact.
The conclusion of Iain Banks's 1993 novel Complicity was set here and the film adaptation used it as a location.
The island is now an RSPB reserve, and is home to breeding pairs of common eider, Sandwich terns and various gulls.