The Full form of IONNO is I don't know, or IONNO stands for I don't know, or the full name of given abbreviation is I don't know.
IONNO (I don't know)
I don't know is known as IONNO.
IONNO all full forms
All the above full forms are related to IONNO. A little information is given about one of these full forms. If you are not satisfied with the information given about 'I don't know (IONNO)', then comment. Or if you know more about 'I don't know (IONNO)', then write.