People : Hugo Koch to Janis Koch
Ian Koch 3 people
Inez Koch 3 people
Irene Koch 5 people
Iris Koch 2 people
Irma Koch 2 people
Isabella Koch 2 people
Jack Koch 21 people
Jackie Koch 3 people
Jaclyn Koch 4 people
Jacob Koch 7 people
Jacquelin Koch 2 people
Jacqueline Koch 3 people
Jacquelyn Koch 3 people
Jade Koch 2 people
Jaime Koch 2 people
Jake Koch 4 people
James Koch 121 people
Jamie Koch 3 people
Jan Koch 3 people
Jana Koch 4 people
Jane Koch 12 people
Janeen Koch 2 people
Janet Koch 26 people
Janette Koch 2 people
Janice Koch 19 people
Janine Koch 7 people
Janis Koch 6 people