I wish I could offer more information but we don't know the names of the cousins in the photos. My great-grandmother came from Lappa Jarvi, Finland in 1901 and married and settled in Brooklyn, NY. In about 1911 or so (I'm doing this from memory because we're on vacation and I don't have my files for reference), they moved to Viriginia, MN, where many Koskelas already lived. They only stayed a year and then moved to Wakefield, Gogebic Co., MI. Those pictures are from visits they made back and forth after moving to Michigan.
I seem to recall seeing obituaries for 2 Matt Koskelas available from the genealogy society in Gogebic Co.