Cochichiwicke:
Before European Settlement
The area we know as Andover was settled as early as 7,000 BC. Approximately 100,000 people lived in the area when European settlers arrived in the 1600s. The people living in the valley were likely part of the Pennacook Confederacy who spoke the Algonquin language.
This part of the Merrimack Valley was known as “Cochichiwicke” by the local population. The people lived in seasonal camps, planted corn, tobacco, and other crops, and fished for salmon and alewives in area rivers.
Shortly after the first Europeans settled in eastern Massachusetts, diseases which the native people had no resistance to had reduced the native population from 100,000 to only 5,000.
Reference: Juliet Haines Mofford, Andover Massachusetts: Historical Selections from Four Centuries