Once they were independent and organised, the Latvians called their standard rifles "Ross-Enfields".
It is known that they had a bunch of Pattern 14s, but I have seen a photo, taken in Riga in 1926, of several hundred men, all with Mark III Ross Rifles. So they had at least a mixture of these two types. British aid following the Great War got Latvia such fun toys as Sopwith Camels with Vickers guns.
Earlier, they used German equipment in their fight against Germany at the conclusion of the Great War. The British ran in a destroyer at that time with German smallarms and 16,000 pounds Sterling in German ammunition.
Hope this helps.