OpenStreetMap
South of Madrid
Postet gant jamesks da 28 October 2008 e English. Hizivadur diwezhañ d'ar 29 October 2008.Lots of way-tracing from Yahoo. Now Madrid has some suburbs, though I am glad I do not live there.
also adding some towns and villages further out towards Toledo.
Kaozeadenn
Evezhiadenn a-berzh BlueMM d'an 29 October 2008 da 04:09
AFAIK, you can't use Geonames data in OSM. Geonames get data from anywhere it can, and doesn't meet the OSM license requirements. See osm.wiki/index.php/Geonames
As always for new data sources, if it's not mentioned that is ok to use on the wiki, bring it up on the legal mailing list to verify it's fine to use.