Should case repair write St Clair and San Martín with their capital? JOHN ST CLAIR repairs to John st Clair #1069

rules/R4 writes a particle doing a particle's work in lowercase, unless the vocabulary records a casing for it (#604). The saint particles (st, ste, san, santa) and the rank freiherr have no recorded casing, so every repaired spelling lowercases them, though nobody writes a saint surname or a German rank that way:

A mixed-case name is left alone without force, so only the one-case and forced paths show it. Measured on master (c620754), 2026-11-04.

Proposal, in rule shape

When: case repair writes a particle that is a saint word (the saint kind: san, santa, st, ste) or a rank (freiherr, freiherrin).

Then: it is written with a capital (St, Ste, San, Santa, Freiherr), as a cased mask on the word writes it. The mechanism is the one #604 used for the Irish particles.

Because: these words are particles because they join the surname behind them, not because they are written lowercase. A saint surname (St Clair, San Martín, Santa Cruz) and a German rank written inside the surname (Freiherr von Richthofen) are capitalized in every convention that writes them.

Open questions

• Does the mask belong on the word (every reading of st, and san as a Spanish given-name prefix) or only on the particle reading?
• sta and sto (Should Juan Sta. Maria read family Sta. Maria? Today it reads middle Sta., family Maria #725) and any rank Should Otto Graf Lambsdorff read family Graf Lambsdorff, as Manfred Freiherr von Richthofen reads family Freiherr von Richthofen? #709 adds would take the same mask. Should the rule key on the kind, so a new saint or rank word cannot miss it?
• Snapshot and corpus counts are still to be measured: how many case-view moves, mostly FEC's uppercase ST … surnames.