The spelling of the word "Helwig" is pronounced as "hel-wig" and written as /ˈhɛlwɪɡ/ in the International Phonetic Alphabet (IPA). The first syllable "hel" is pronounced with a short "e" sound, while the second syllable "wig" is pronounced with a short "i" sound. The "w" in "wig" is pronounced as a consonant, and the "ig" is pronounced as a separate syllable. Overall, this combination of sounds and letter placement leads to the distinct spelling of the surname "Helwig."