When did the Fitzgerald's family migrate?

The Fitzgerald family, like many others, likely migrated during periods of significant social or economic change, though specific details about their migration would depend on which Fitzgerald family is being referenced. In general, many Irish families, including those with the surname Fitzgerald, immigrated to the United States during the Great Famine of the 1840s. If you have a specific Fitzgerald family in mind, please provide more context for a more precise answer.