Late Gaulish s(o)uxtu, possibly meaning ‘cooking pot’, in a text dated to the middle of the 2nd c. ad related to EIr. suacht ‘vat, trough ?', and possibly also to ScG suacan ‘earthen pot, crucible, etc.' and Ir. suacán ‘pot’. Cf. P.-Y. Lambert, in Ériu 54, (2004), pp. 263-264.
ad P.-Y. Lambert, in Ériu 51 (2000), pp. 189-192. The apparent divergence of the Scottish Gaelic reflexes is explained by the merger of historical c and chd/cht.