As I told you our surname was taken in use1936 and as far as I know none of our family members haven't migrated to Cuba. The only possibility for migration is that some our ancestor named Esselström has moved abroad and changed his lastname to Estama. Sounds pretty incredible. One great uncle of mine lived in Vancouver, Canada between 1950-1963 and then he returned back to Finland. Later he divorced and his wife (Kerttu Estama) went back to Canada and has lived there since then.