I am a seven letter word.
The first two letters denote men.
The first three letters denote women.
The first four letters denote men.
The whole seven letters denote women.
Who am I?
The answer is
He - denotes men
Her - denotes women
Hero - denotes men
Heroine - denotes women
You are :
Heroine, which refers to a woman
First two letters :
He, which denotes a man
First three letters :
First four letters :
Hero, refers to a man
Here is another one.
Evelina ("Evel" Knievel)
There may be others of this form...
A bit of a stretch at the end but..
First 3 letters:
Her - denoting woman
Herr - The German equivalent of the 'Mr.' title
HerRoom - An online lingerie retailer