A sub-project is to figure out where specific placenames appear in the world. For example Kossuth is a very common street name in Hungary, but also appears in a lot of place names around the world - especially in the US
The idea is quit simple, we just have to extract all of the placenames from the OSM planet data, and then plot the points in a geojson where these elements occur.
Please see https://github.com/sztupy/kossuth-map/tree/gh-pages/world for scripts and some generated examples
Kossuth, Petőfi and Rákóczi are very common streetnames. However while Kossuth appears a lot around the world, the others are more confined to Hugnary and surrounding countries
Another thing to look at is various cities whose name appears in other places. Below you can see some examples.
Finall some examples of other historical figures.
The data above is using the latest OpenStreetmap planet database to obtain the values. Two other sources have been tested, one the GeoNames database, the other the OsmNames database. Both of them contain less information than the OSM planet data, so they have been dismissed as a source. Example data can be found in the source code for the "Kossuth" check to see where they are different to the OSM planet data.