Marnel or Marnell is a unisex name, with origin in the name Marni.
Other sources tells that it's an Israel name, and means Rejoicing.
They say that:
People with this name have a deep inner desire for a stable, loving family or community, and a need to work with others and to be appreciated.
People with this name tend to be creative and
excellent at expressing themselves. They are drawn to the arts, and
often enjoy life immensely. They are often the center of
attention, and enjoy careers that put them in the limelight. They tend to become involved in many different
activities, and are sometimes reckless with both their energies and with money.
- But there are places in northern Africa where Marnel is used as an invective. It's often used towards children who cannot behave and hurt others with their rude actions.