GEDCOM files consist of islands of people
An island is a group of persons related to each other, but not related to other persons in the same GEDCOM file.
Hence, each island is a separate genealogical tree.

 If everyone is related there is just 1 island in the GEDCOM file
 Islands of size 1, represent single persons, not connected to other persons.

To generate the islands within the GEDCOM file, use Reports ⟶ Island Report


The generated island report shows islands of related people.

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Island 94 contains 46 related people (everyone on this island is related, but they are not related to other persons in the GEDCOM file)

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 Use the Islands to split GEDCOM files into smaller GEDCOM files of related people.
Deleting islands will not break relationships as people on the island are not related to people on other islands.

Save the Island to a new GEDCOM File.
Delete the current island.




 After running the Island report view the islands in the person table
Right Click ⟶ Change Displayed Columns
Add the two Island columns.

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The Island report populates the and Island columns in the table

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 Click on the Island header to sort by Island.
 The island information is only available after the Island report is run.

View the island for a person using Right Click ⟶ View Island
This shows the set of persons on the same island (everyone the person is related to)

 Persons with an island size of 1, are not related to anyone else in the GEDCOM file.

(Click on the image to enlarge)