Toenjes is a German surname with a unique pronunciation. Its spelling is explained by using the International Phonetic Alphabet (IPA) phonetic transcription. The first syllable, "Toe," is pronounced like the beginning of the word "toe" using the IPA /tʰoʊ/. The second syllable, "njes," is pronounced with the IPA /njɛs/ sound, which is a combination of the "ny" sound and the "es" sound. Therefore, the correct pronunciation of Toenjes is /tʰoʊ.njɛs/.