Sometimes first names come from parents naming their children with a surname from the mother's family. Surnames can come from occupations like Fletcher, Archer, Smith, Cooper, etc. They can also come from placenames, i.e., John of Wootten becomes John Wootten. The "berry" spelling was often phonetic rather than a specific meaning, so it could have originated as "bury." There is a place name.
Littlebury is a small village in north-west Essex. It has a population of around 600 which includes the two hamlets of Littlebury Green and Catmere End. It lies around a mile and a half from the market town of Saffron Walden and fifteen miles south of Cambridge, the nearest city. Situated in the Uttlesford district, the parish of Littlebury includes the hamlets of Catmere End, Chapel Green, and Littlebury Green which lie to the west and south-west of the church. It also includes parts of the estate of Audley End. The name Littlebury first appears in a 10th century will as lytlan byrig and in 1008 as Lithanberi. Source: https://en.wikipedia.org/wiki/Littlebury
Littlebury is a small village in north-west Essex. It has a population of around 600 which includes the two hamlets of Littlebury Green and Catmere End. It lies around a mile and a half from the market town of Saffron Walden and fifteen miles south of Cambridge, the nearest city. Situated in the Uttlesford district, the parish of Littlebury includes the hamlets of Catmere End, Chapel Green, and Littlebury Green which lie to the west and south-west of the church. It also includes parts of the estate of Audley End. The name Littlebury first appears in a 10th century will as lytlan byrig and in 1008 as Lithanberi. Source: https://en.wikipedia.org/wiki/Littlebury