Following link is the audio clip which recorded from the famous talking dictionary, I discovered that there are more than two pronunciations for letter 'Z', the third pronunciation of 'Z' is 'i-zərd', could you please tell me which English speaking country would pronounce 'Z' as 'i-zərd'?
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"In most dialects of English, the letter's name is zed ( /ˈzɛd/) reflecting its derivation from the Greek zeta (see below) but in American English, its name is zee ( /ˈziː/), deriving from a late 17th century English dialectal form. Another English dialectal form is izzard ( /ˈɪzərd/), which dates from the mid-18th century and probably derives from Occitan izèda (literally translating as "i zed")[clarification needed] or the French et zède "and z".[dubious – discuss]"
Z - Wikipedia, the free encyclopedia