Source: Schema.org v30.1 vocabulary. Official additionalName property definition.
What does additionalName mean?
An additional name for a Person, can be used for a middle name.
Parent properties
Used on types (domainIncludes)
Expected value types (rangeIncludes)
Schema.org domainIncludes and rangeIncludes are descriptive guidance, not strict validation prohibitions. Check the official reference for updates.
Related reference
Browse all Schema.org types and properties · Google feature support status