Palenque (Spanish) comes from Spanish palenque, from Catalan palenc, from Catalan pal, from Old Occitan pal, from Latin palus, from Proto-Italic pākslos, from Proto-Indo-European peh₂ǵ-slos, from Proto-Indo-European peh₂ǵ- — to attach.
Palenque (Spanish): Palenque