Elector Georg Ludwig of Hanover became King George I of Great Britain in 1714. This happened because the Act of Settlement 1701 declared Georg Ludwig's mother, Sophia, the heir to the throne (this was done specifically to cut off Jacobite claims), but she died a month before Queen Anne (which was a shame: by all accounts she was brilliant, and she was a patron of the sciences), so the throne went to her son.
Furthermore, said symbols must convey previously unknown information - which this rule does not, as the nouns have the same meaning whether capitalized as not, and the "information" conveyed is redundant.
Maybe German language should consider a syntax highlighter?
In English, nouns are often spoken with stresses in a sentence, which could make capitalizing them a pronunciation issue, just as other punctuation is (e.g. commas for pauses, question mark for changing intonation). I don't know about German, though.