Loading names suggestion even for datepicker

This is strange but whenever I code my label as

      <label for="dob">Date of Birth</label>

The Jquery datepicker loads perfectly, but when I code my Label as

 <label for="ndob">Nominee Date of Birth</label>

The autocomplete suggestions for Names loads first which hides my date picker.

After doing many tests I found its happening only when id and Label name starts with letter 'n'.