| Pers. | kàkul | tuft of hair |
| Pers. | kàkuli et var. | Hoopoe, 263 |
| Kurdish | kukulo | Crested Lark, 299 |
| Pers. | cuqul | Crested Lark, 299 |
| Pers. | kokila et var. | Hoopoe, 263 |
| Inde: Himal.o. | koklas | Koklass Pheasant Pucrasiamacrolopha |
| Assyr. | kukilè | peak, mountain |
| Basque | kukil | summit |
| Anc.Greek | kokalos | cock, 2 |
| Alb. | kokulle | hood |
| Alb. | kakuleti | hood |
| Alb. | kukul | summit |
| Sbc. | kukulj, kokulj | crest |
| Sbc. | kokolj, kukaljka | Great Crested Grebe, 66 |
| Sbc. | kokaljika | Shag, 106 |
| Sbc. | kukuljaca | Crested Lark, 299 |
| Bulg. | kukuletka | Crested Lark, 299 |
| Basque | kukula | crest; top of a tree |
| Cymric | cwcwl | hood |
| Aroman. | cucól | cock, 2 |
| Franç.: Aveyr. | cocolucho | cock's comb |
| Franç.rég. | coquelucho | hood; Crested Lark, 299 |
| Roman. | ciuciulete | morel |
| Cat. | cucullet | White Wagtail, 313 |
| Ital.: Cosenza | cucullata | Crested Lark, 299 |
| Ital.: Sard. | cucullia | Crested Lark, 299 |
| Ital.: Sard. | scoccalettu | Red-breasted Merganser, 60 |
| Span. | cuquillo | Hoopoe, 263 |
| Prov. | caouquiyou, couquiado | Tufted Duck, 48 |
| Prov. | couquillado et var. | Crested Lark, 299 |
| Franç.: Aoste | cocalàno | disorder |
| Franç. | coq-à-l'âne | passage sans transition d'un sujet à un autre (ainsi orthographié par étym. pop.) |