hiepojymnia, corrected
heard as hiepojymnia
spelled hypogymnia
Hypogymnia. The first y and the g both go back in.
What the ear did
This is the name written entirely by sound, and it lands three letters away from the target. Both the y and the g are Greek inheritances rather than English choices.
H-Y-P-O-G-Y-M-N-I-A
The full entry for hypogymnia covers the name itself.