Hi,
With the little bit of information you provided and what I know of Hispanic tendencies for adapted/adopted, creative spellings of foreign names, I can tell you that, for certain, your name has gotten no Hispanic roots, however, been made up in a Latin American country.
The Y in Yohanny could have been replaced for a J, as in Spanish the Y simulates the same sound as a J, in English. This would lead to the name Johanny, which could be a variant of
Johanna,
Jovana or Giovana(see the resemblance of Johanny with the name
Johnny??), all of these, female versions of John(Juan). So, in conclusion and in theory, your name would be an equivalent of
Juana or Juanita(hence the y at the end, making it a pet form of the name)with a creative spelling of either of the different, known forms.
I guess the only ones who could come up with a more accurate explanation of the meaning and origin of your name, would be your parents.
I hope this helps a bit.
Muchas suerte!,
~Magia~