"Blend of Matti and Lynn"
The name Mattilynn is commonly a female name from the "American" origin.
Mattilynn is a modern American blend of Matti, a short form of Matthew that also appears as a given name on its own, and Lynn, from Welsh llyn, meaning lake. The double t follows Matti rather than the Madeline-derived names spelled Madi-, such as Madilynn. The name first appears in United States birth records in 2000.
The pronunciation of Mattilynn is MAT-ih-lin.
