Ȥ
Z with hook, Ȥ (minuscule: ȥ) is a letter of the Latin script. The Unicode standard notes "Middle High German" for the application of the grapheme, intended to represent the coronal fricative  also transcribed as tailed z . It is used in modern printings of Medieval German literature to indicate those cases of  pronounced as , , modern German: , from  pronounced as , as is still the case in modern German; the manuscripts typically used  to represent . Computing codes 
This letter's Unicode codepoints are U+0224 and U+0225, for uppercase and lowercase respectively. See also
Middle High German
High German consonant shift
Middle High German literature
Ʒ (ezh)
Ɀ (z with swash tail)
Ⱬ (z with descender)
Ƶ (z with stroke)

Latin letters with diacritics