The original name for the practice of using intra-word capital letters is the comparatively pedestrian term medial capitals. In English, this concept is more often associated with proper nouns – popular in trademarks as shown but also observed in surnames like McDonald. Just occasionally it crops up in clipped abbreviations, e.g. WiFi (= wireless fidelity), although here the capitalisation often disappears as the word becomes more established (i.e. Wifi, wifi).