The spelling of the word "mccrum" may seem confusing due to its combination of consonants. However, its phonetic transcription shows that it is pronounced /məˈkrʌm/. The first two letters "mc" are actually a prefix used in some Scottish and Irish surnames, indicating "son of". The second part, "crum", is a variant of the word "crumb", meaning a small particle or fragment. Therefore, the word "mccrum" can be interpreted as a variation of a surname meaning "son of the small fragment".