Thank you for your emil, and please pardon my long overdue reply.
Yes we have a little information on Peter Kosakivich, he was a good friend of my Grandfather Eduard Wlaschin, and Peter was my grandfathers witness on his application for citizenship in 1888 in Colorado.
Peter and Anna were among a group of about 25 families from Bukovina who migrated to yuma county, Colorado in late 1880's. and settled in the McGee township in the northwest part of the county.
Most all of these families were directly related to each other and very close.
After a few years of drought, and near starvation, the families migrated, by wagon train in 1894 to Wisconsin for a year, to find jobs in the lumber industry, and then back to Nebraska where they stayed.
Please be in contact and I will attempt to help you all I can, or get you connected to someone who can help.