Where does “pequeñín” come from?

pequeñín (Spanish) comes from Spanish pequeño, from Vulgar Latin peccuinus, from Latin pittus, from Proto-Celtic bikkos, from Proto-Indo-European bʰég-ko-s, from Proto-Indo-European -kos — Creates deadjectival and desubstantival...

Ancestry of “pequeñín”, step by step

StepLanguageWordMeaning
1Spanishpequeño"superlative": pequeñísimo; small; little
2Vulgar Latinpeccuinus—
3Latinpittussmall, little
4Proto-Celticbikkossmall, little
5Proto-Indo-Europeanbʰég-ko-s—
6Proto-Indo-European-kosCreates deadjectival and desubstantival...
Every word from Proto-Indo-European -kos →Every word from Proto-Indo-European bʰég-ko-s →Every word from Proto-Celtic bikkos →