The word "Sundberg" is often spelled out phonetically as /ˈsʌndbərɡ/. The first syllable "sun" is pronounced as the word "son" but with an added "u" sound. The second syllable "dberg" is pronounced with a distinct "d" sound followed by the common sound made by the letters "ber" and ending with a hard "g" sound. This spelling accurately reflects the pronunciation of the name and is commonly used in English-speaking countries.