Jonathan and Randi Kolsters of Oakdale welcomed the arrival of their son, Zachary Kolsters, on Jan. 22, 2013.
The newborn weighed six pounds, one ounce upon arrival at Oak Valley Hospital.
The mother is the former Randi Kachel.
Welcoming home his new baby brother was big brother Benjamin.
Connie Copenhaver of Castro Valley is the maternal grandmother.
Marsha and Douglas Kolsters of Oakdale are the paternal grandparents.