Cognomen Gilleran (Gilleran 
) , around the globe, is a rare family name. The family name Gilleran is habitual in Ireland, where it is quite a rare surname, Philippines, where it is a rare surname, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Gilleran | Philippines, Australia, United States, United Kingdom, Ireland |
| mike gilleran college basketball player (1969–1971) Seattle |
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| dermot gilleran Irish cyclist |
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| john gilleran researcher (ORCID 0000-0001-6797-8968) |
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