Not long ago I accidentally found out about a pair of these words in Spanish:
1. pelo (=hair)
2. peluca (=wig) and its derivatives peluquero, peluquería (=hairdresser, hairdresser's).
The word pelo comes from the Latin pillus, but peluca came from the French perruque, and this from the Lombard parruca of unknown origin [0]. As Spanish used an "L" in the word for hair, it contaminated the imported perruque due to its proximity in meaning.
For contrast, the words for wig and hairdresser('s) in standard Catalan (perruca, perruquer, perruqueria) did not cross over with the word hair (pèl) and kept their original "R".
1. pelo (=hair)
2. peluca (=wig) and its derivatives peluquero, peluquería (=hairdresser, hairdresser's).
The word pelo comes from the Latin pillus, but peluca came from the French perruque, and this from the Lombard parruca of unknown origin [0]. As Spanish used an "L" in the word for hair, it contaminated the imported perruque due to its proximity in meaning.
For contrast, the words for wig and hairdresser('s) in standard Catalan (perruca, perruquer, perruqueria) did not cross over with the word hair (pèl) and kept their original "R".
[0] https://www.treccani.it/vocabolario/parrucca