Across the world, Geoghagan (Geoghagan 
) is an extremely rare unknown gender first name. Predominantly, Geoghagan is the last name as well as the forename.
Ann, Leon, Lisa, Jake, John, Joel, Jess, Jean, Jeff, Tami, Toni, Todd, Tina, Erin, Earl, Fred, Megan, Shane, Susan, Serah, Sonja, Alice, Lana, Allen, Greg, Gary, Amy, Kay, Pat, Jay, Joy, Tom, Tim, Mary, Mark, Mike, Sean, Alma, Anna, Carl, Beth, Kyle, Rina, Ryan, Dana, Dawn, Drew, Gene, and Angel