We invite any males with the surname McOsker, McCusker, MacCosker, MacCoskar, MacOscair, or any close variant, to join our project.

We believe the following:

1)      All males with these surnames probably descend from a common ancestor.

2)      We should find enough similarities in our DNA strings to support this assumption.

Our long term goal is to examine enough data to corroborate these beliefs, and to provide a forum for descendants of Oscar Mag Uidhir worldwide to share our stories.