In specific programming environments or proprietary data structures, this could be a localized variable name. "AnonZZ" might refer to an anonymized dataset, "Ami" to an Amazon Machine Image, and "1.var" to a specific versioned instance.
If this string appeared on your system as a file extension or in a console log, it is often a sign of or a system error related to a specific localized script. AnonZZ.Ami.1.var
Given the structure of the name, here are the most likely contexts for such a string: "Ami" to an Amazon Machine Image