Where does “Valkenburg” come from?

Valkenburg (Dutch) comes from Dutch valk, from Middle Dutch valke, from Old Dutch falco, from Proto-West Germanic falkō, from Proto-Germanic falkô, from Proto-Indo-European pōl-, from Slovincian pól, from Proto-Slavic polъ — to split off, separate; to chop, to separate.

Ancestry of “Valkenburg”, step by step

Valkenburg traces back through two separate lines of ancestry.

via Dutch valk

StepLanguageWordMeaning
1DutchvalkA falcon, bird of the family Falconidae, in...
2Middle Dutchvalke
3Old Dutchfalcofalcon
4Proto-West Germanicfalkōfalcon
5Proto-Germanicfalkôfalcon
6Proto-Indo-Europeanpōl-
7Slovincianpólhalf
8Proto-Slavicpolъside, flank; half; member of a pair of options →...
9Proto-Indo-European(s)pelH-to split off, separate; to chop, to separate

via Old Dutch burg

StepLanguageWordMeaning
1Old Dutchburgfortress, castle; city
2Proto-West Germanicburgfortification; city
3Proto-Germanicburgzfortification, stronghold; city
4Proto-Indo-Europeanbʰr̥ǵʰ-
Every word from Proto-Indo-European (s)pelH-Every word from Proto-Slavic polъEvery word from Slovincian pól