The place name that caused me to comment about the spelling "Londen" was "Oos Londen" (I saw it in some entries in a place-name spelling errors report). From the report you linked to above, it's apparent that "Oos-Londen" or "Oos Londen" is a place in the Cape Colony or Cape Province (South Africa). Philip van der Walt should be able to confirm that.
New London, Connecticut, is not spelled New Londen. (There was a Dutch settlement in the vicinity of New London, but that settlement didn't name itself for an English city.)
Almost all of the instances of "Londen" on that report you linked to are Dutch spellings, including people's names (like Van Londen) and that place in the Cape Colony.