Some names are onomatopoeic, i.e., we derive them from their sound. Examples are hiccup and whooping cough . Sometimes names reflect a resemblance to other objects. Pelvis is Latin for basin or funnel. Sella turcica means turkish saddle.
Eponyms are very common.
These are words that contain the proper names of people. Many are modifiers of other words. Wasserman test, Eustachian tube, Hodgkin's disease, Babinski sign, Codman's exercises, etc. Whether or not to capitalize an eponym is open to question. Often we do not capitalize commonly used eponyms.