Courtesy names and modern everyday names are different
Historical writing may introduce a person by a personal name and a courtesy name. Do not treat them as interchangeable modern form fields.
Keep the historical context
A courtesy name belongs to particular historical social practices. Biographies may also use art names, titles, posthumous names, or reign names. These can be fascinating when reading Chinese history, but they do not mean a present-day learner needs to acquire all those names.
Choose what you will actually use
For ordinary conversation, a well-explained personal name is enough. If you encounter a famous writer with several names, identify which one is being used before turning it into a naming model. Avoid copying a historical title as though it were an everyday given name.
A biography of Ouyang Xiu may mention forms beyond 欧阳修; the surname/given-name split remains 欧阳 / 修.
What to do with this
Use historical name types as reading knowledge, not as extra requirements for your own name.
Sources & limits
Sources support the specific facts cited above. An editorial name interpretation is not an ancient quotation or proof of family ancestry.