Elaine, to find a cousin you need to set out the generations in a chart for yourself, with birth and death dates (and places) for the people you know, and adding their siblings and marriages, one generation at a time.

If you then post each generation more clearly with the years of the births & deaths, and the places where they were living, someone may be able to help. Did the will not give addresses for each of the potential beneficiaries?

Sue