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Costello/Costilow/Costley/Coustley/Casto Surname Project
  • 182 members

About us

The Costello/Costilow/Costley/Casto DNA Project is for all who wish to work together to find their common heritage through DNA testing and sharing of information. Costello is a surname most frequently found in men of Irish ancestry. All variant spellings are welcome. If your surname spelling is missing, we'll be glad to add it.