Dż (digraph)

Dz is a digraph of the Latin script, consisting of the consonants D and Z. It may represent /d͡z/, /t͡s/, or /z/, depending on the language.

Dz generally represents /d͡z/ in Latin alphabets, including Hungarian, Kashubian, Latvian, Lithuanian, Polish, and Slovak. However, in Dene Suline (Chipewyan) and Cantonese Pinyin it represents /t͡s/, and in Vietnamese it is a pronunciation respelling of the letter D to represent /z/.

Some Esperanto grammars, notably Plena Analiza Gramatiko de Esperanto, consider dz to be a digraph for the voiced affricate [d͡z], as in "edzo" "husband". The case for this is "rather weak". Most Esperantists, including Esperantist linguists (Janton, Wells), reject it.

...
Wikipedia