Should Attorney at Law after a comma read as a credential? (Hiruni Wijesinghe, Attorney at Law, M.P. gives given 'at', family 'Hiruni Wijesinghe') #1243

Sri Lanka's Parliament writes a lawyer member as Hon. Hiruni Wijesinghe, Attorney at Law, M.P.. Attorney is in en.toml as a title, so C1 (the suffix comma decision) reads the part after the comma as the given part, opened by a title (measured on master ccaf6ad):

How often: 25 of the 225 current members on parliament.lk's English list, and 3 of the 657 past members I read. The phrase is the professional designation of a lawyer in Sri Lanka, written after the name; Attorney-at-Law with hyphens is the usual spelling elsewhere (Sri Lankan letterheads, and the same designation in Jamaica and Trinidad and Tobago). Nothing in docs/design/ or the issues mentions it.

Questions

• A suffix reading is of one word, so Attorney at Law can't be listed as it stands. Should the hyphenated attorney-at-law and barrister-at-law be listed as credentials written as words, and the spaced phrase left as it is?
• Or should a comma part made wholly of Attorney + at + Law be read as a credential phrase, the way H9 reads a title phrase?
• Behind which comma? Here the phrase stands between the name and M.P., so it is the second of three parts; C13 (a credential opening the part after the comma) would reach it if Attorney were a credential, but it is a title.