Is this David Hain?

This is a mystery tintype or daguerreotype that my grandfather had with other Hain photos. This was unlabeled/unidentified.

Based on the charcoal drawing of David Hain (posted in my gallery) I've tried to identify this unidentified tintype (or daguerreotype?) as David with his wife and daughter Mary Jane. Wife Margaret died in 1845 when Mary Jane was 7 years old, so it's possible. The little girl might be about 6 or 7. The hair is styled in the same manner on the gentleman as it is on the David Hain charcoal drawing. Any opinions? Style of dress is hard for me to date. 1800's obviously.