* McGinness: This spelling is very common and often considered an alternative or even a more common version of the name. The "Mc" prefix is often added to Irish surnames, indicating a clan or lineage.
* M'Ginness: This is a less common variation, using the apostrophe to indicate the "Mc" prefix.
* Maginness: While not as common as the others, this spelling is sometimes used.
It's worth noting that these variations might also be found in conjunction with different spellings of the middle name. For example, you could find "Meginness" with a middle name like "McGinness" or "Maginness," adding to the diversity of possible combinations.
Ultimately, the "correct" spelling depends on the individual's preference and the specific historical context.