My grandfather Johan Myllykoski, changed to John Koski, born 1879 in Finland, emmigrated in 1898 on the ship Etruria. On this same ship were possible siblings or cousins--Joakko Myllykoski born 1875, Matti Myllykoski born 1877, and Maria Lammi born 1878. Passports issued to Johan, Maria, and Joakko were issued the same day and are consecutive in number. Ishpemming, Michigan was the destination for Joakko, Matti, and Maria. As there are only a few individuals with the surname Myllykoski, I belive their name may also have been shortened to Koski.
Matti Myllykoski names a brother Franz Myllykoski of Ishpemming. I would like to compare notes with anyone having knowledge of any of these individuals.