In the first half of the 10th century, scribes of Anglo-Saxon Chronicles seem to tend to use the OE word Scotland and Scottas to designate Scotland and its inhabitants, the Scots, respectively.

The following are some examples:

• a. 933 (A): Her for Æþelstan cyning in on Scotland, ægþer ge mid land here, ge mid scyp here, his micel ofer hergade ('Here King Aethelstan went in Scotland, both with the land army and with the fleet, and lay it waste much')......(Earle & Plummer eds. 1892: 106).

• a. 926 (D): *Sihtric acwæl.7 Æþelstan cyning feng to Norðhymbra rice. 7 ealle þa cyngas þe on þyssum iglande wæron he ge wylde. ærest Huwal West Wala cyning./ Cosstantin Scotta cyning.7 Uwen Wenta cyning.7 Ealdred Ealdulfing Bebban cyning. ('Sithric was dead, and now King Aethelstan succeeded the kingdom of Northumbria. He ruled all the kings who were in this island: first King Hywel of the West Welsh, King Constantin of the Scots, and King Owain of Gwent, and King Ealdred of the Ealdulfings of Bamburgh') (Earle & Plummer eds. 1892: 107).
• a. 924 (F): Her wearþ Eadward cing gecoren to fædre 7 to hlauorde of Scotta cinge 7 of Scotton. 7 Regnolde cinge 7 of eallum Norðhum 7 brum 7 eac Streaclede Wæla cinge. 7 of eallon of Streclæde Wealan. ('Here King Edward [the Elder] got chosen to the father and to the lord by the king of Scots [Constantin] and the Scots, and by King Regnall and by all the Northumbrians, and also by the King of Strathclyde Welsh (Britons) and by all the Strathclyde Welsh (Britons)......') (Earle & Plummer eds. 1892: 105).

References:

• Earle, John & Charles Plummer (eds.). Two of the Saxon Chronicles Parallel, i: A Revised Ed. London, 1892.
• Swanton, Michael (trans.). The Anglo-Saxon Chronicles: New Edition*. London: Phoenix Pr., 2000.