Should Edd be a given name as well as a credential? (John "Edd" Smith gives suffix 'Edd', not nickname 'Edd') #1376

edd has only a credential reading (en.toml), so a quoted or bracketed Edd is set apart as a credential (rule S1) rather than read as a nickname:

• John "Edd" Smith gives suffix 'Edd'
• John (Edd) Smith gives suffix 'Edd'
• BOST, J EDGAR (EDD) gives suffix 'EDD'. This is an FEC contributor, Edgar written Edd.

Edd is borne as a given name: US SSA 5,451 births (M 5,438), a US Census surname of 299. Its cased mask was already refused on that ground (#459). NPPES counts 4,911 providers writing the credential (ED.D. 2,053, EDD 1,700).

A given reading would put edd in the class of credentials that are also names (rule S4). Rule S1 would then leave a bracketed Edd as the nickname. Measured with Lexicon.default().add("edd", kind="given"):

• Fixed: John "Edd" Smith, John (Edd) Smith and BOST, J EDGAR (EDD) read nickname 'Edd'.
• Unchanged: John Smith (Ed.D.), John Smith, EdD, JOHN SMITH, EDD and John Smith (PhD, EdD) still read the credential.
• Broken: John Smith (EdD) gives nickname 'EdD'; John Smith EdD gives family 'EdD'; Smith, John EdD gives middle 'EdD'.

Questions:

• Should edd take a given reading?
• If so, should the writing EdD (a capital inside the word, the way the degree is written) settle the credential, as rule S13 settles a gated word by its capitals? That would keep the three broken readings.