Galwegian Gaelic
George Buchanan, himself a Gaelic speaker, writing in 1575, reported that Gaelic was still spoken in Galloway. In the middle of the century, 1563–1566, an anonymous English military investigator reported that the people of Carrick "for the most part specke erishe".
Pan-Celticism
Before the Roman Empire and the rise of Christianity, people lived in Iron Age Britain and Ireland, speaking languages from which the modern Gaelic languages (including Irish, Scottish Gaelic and Manx) and Brythonic languages (including Welsh, Breton and Cornish) descend. These people, along with others in Continental Europe who once spoke now extinct languages from the same Indo-European branch (such as the Gauls, Celtiberians and Galatians), have been retroactively referred to in a collective sense as the Celts, particularly in a wide spread manner since the turn of the 18th century. Variations of the term "Celt", such as "Keltoi" had been used in antiquity by the Greeks and the Romans to refer to some groups of these people, such as Herodotus' use of it in regards to the Gauls.