Yes, unfortunately most of the little information available is limited to those Lutherans who were Finland-Swedish and/or Baltic-German and thus members of the upper-classes (e.g. Mannerheim and Erik von Pistohlkors) or the middle-class urban Finnish Lutherans in St. Petersburg (e.g. the famous poet Edith Södergran!), but I was particularly wondering about the rural Finnic population, either Lutheran or Orthodox.