In German, is it also correct to use the pronoun "irgendwelch-" in the singular form?

I am Brazilian.
Tell me where you are from, please.

I already know that we use the pronoun "irgendwelch-" for plural, meaning "any".

In German, is it also correct to use the pronoun "irgendwelch-" in the singular form? if yes, does the meaning change?

Write me some examples, please.
 
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