There is some linguistic continuity between the earliest and modern names for many of the larger islands surrounding Scotland. However, the derivations of many of these names are obscure "suggesting that they were coined very early on, some perhaps by the earliest settlers after the Ice Age." Even when names used both in the historic past and the present have some apparent meaning this may indicate a phonetic resemblance to an older name, but one that may be "so old and so linguistically and lexically opaque that we do not have any plausible referents for them." that links Seil to mainland Scotland The
Ravenna Cosmography, which was compiled by an anonymous cleric in
Ravenna around AD 700, mentions various Scottish island names. This document frequently used maps as a source of information and it has been possible to speculate about their modern equivalents based on assumptions about voyages made by early travellers 300–400 years prior to its creation. The island of mentioned in this list may refer to Seil. Seil is probably a pre-Gaelic name, although a case has been made for a Norse derivation. It has also been argued that Seil could be the location of
Hinba, an island associated with
St Columba. Reasons include the island's association with
St Brendan, its location on an inshore trade route from
Antrim to the north and its suitability for a substantial settlement. The (great sea bag) referred to in texts about Hinba could refer to the Seil Sound and narrows at
Clachan Bridge where the "bag" captures the rapidly flowing water that floods under the bridge. Rae, equating "Hinba" with the Gaelic , notes that the adjacent mainland parish of Kilninver means "church of Inbhir" and suggests that the derivation of "Seil" may be of Scandinavian origin with similarities to the
East Frisian place name or meaning a "seep or passage of water". This, he proposes, could have been a Norse interpretation of Hinba/Inbhir. However, Mac an Tàilleir notes that Kilninver or "appears to mean 'church by the river mouth', and an older form of , 'Finbar's church' appears". 's Firth of Lorn in the
Blaeu Atlas of Scotland It has also been suggested that Seil may be the referred to in the
Chronicle of the Kings of Alba, which records a victory of the Scots over a
Viking force during the time of
Donald II in the 9th century. The name used in the 12th century
Book of Leinster is . The earliest comprehensive written list of Hebridean island names was undertaken by
Donald Monro in his
Description of the Western Isles of Scotland of 1549 in which Seil is listed. The modern spelling of "Seil" also appears in the 1654
Blaeu Atlas of Scotland. ==Geography==