The Keska's of Iowa County lived in the Town of Pulaski, There was a John and Margaret from which a daughter Monica B. was born who had a brother Delbert. These last two are deceased and a end-of-line for this branch of Keska as neither married. Monica was a school teacher for many years.
To start again - I believ it started from a family of Thomas and Mary Keska which from there was John. If you check Find a Grave for Keska's in the ST. Joseph Cemetery in Avoca, Iowa County, WI who will find several and they are all related - just have to determine generations by dates
But no Keska's reside in the Avoca or Town of Pulaski today (Nov 2014)
There is also a Thomas keska and wife buried in the St. John's Cemetery in nearby (6 miles west of Avoca) in Grant County, WI but I am not sure if they are related.
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for more detail.