El Salvador – Jesus, of course
Uzbekistan – One of the few cases where a nation was named after its founder, Oz Beg (the variant in the name is a trick of Altaic-language vowel-change rules), who united a group of Turkestani peoples under his rule.
Greece was not named after Helen of Troy but after the eponymous Hellen, male, almost certainly fictitious and a relative (in the myths) of the two brothers and their two nephews who gave rise to the four main Greek clans: Achaians, Dorians, Ionians).
Georgia is a Western coinage for the country called in its own tongue Sakartvelo or in Russian Gruziya.
Assyria, the long-lived north Iraqi empire of pre-Classical times, was supposedly named after Asshur (mythical hero, identified as a Cushite in the Bible). However, it appears to have been named after the city Asshur, its first capital, and the folk hero a case of toponymic myth).
Lorraine, an autonomous duchy for an extended period in early medieval times, was named after one of Charlemagne’s sons in a rather strained sequence: He was Lothair, and was Emperor in succession to Charlemagne, but with his two brothers having the heartlands of France and Germany and his personal domain a strip running from the Netherlands through Lorraine to northern Italy. This area was named Lothairingia, and after the separation of Italy under his son, the northern portion was divided into Upper and Lower Lotharingia. The lower region segmented off under the Counts of Holland, Louvain, etc., and the upper region eventually became the area now termed Lorraine, the name losing consonants with aplomb.
San Marino was named after its founder, St. Marinus.
Half the West Indies are autonomous, “free association,” or independent nations named aftr someone, usually the saint on whose name day that particular island was discovered.