Hi, My husband has inherited X2c1 from his mother, and the oldest known anchestor in her motherline was born c. 1680 in Eastern Finland near Carelia.
Mtdna haplogroup X is one of rarest matrilinear haplogroups in Europe, being found only about 1% of the overall population. X2c can be found especially in Western and Nothern Europe, X2c1 e.g. in Skandinavia and Finland. More information can be found in https://www.eupedia.com/europe/Haplogroup_X_mtDNA.shtml
Regards
Kirsi