Hoarau is a French surname that is pronounced as [ɔ.ʁo]. The "h" in Hoarau is silent, and the "o" is pronounced as a rounded low-mid back vowel. The next two letters "a" and "r" are pronounced with an open-mid front unrounded vowel and a voiced uvular fricative, respectively. The last letter "u" is pronounced with a rounded high back vowel. The spelling of the word "Hoarau" follows the traditional French orthography, which is known for its complex pronunciation rules.