128. Proper nouns, that is, nouns which are names of persons, cities,
countries, etc., are given Esperanto spelling if they are names of
continents, countries, large or very well-known cities, or if they
are first (Christian) names of persons, as "Azio", Asia, "Skotlando",
Scotland, "Bostono", Boston, "Johano", John, "Mario", Mary. Surnames
and names of places which are small or not well known are more often
quoted in the national spelling. The pronunciation may be indicated
in parentheses, as "Mt. Vernon" ("Mauxnt Vernon"), "Roberto Bruce"
("Brus"), "Martinique" ("Martinik'"), etc.