Yes, it's a lot of kids, but not totally unrealistic! Based on the family of William IV of the UK.
https://en.wikipedia.org/wiki/William_IV_of_the_United_Kingdom
DH: Walter Clarence Louis Ernest David Oscar
DW: Catharine Cordelia Rosetta Marcella Agatha Helene
SDD: Doris Florence Irene Rose Eleanor Josephine
SDD: Regina Lydia Eloise Adeline Victoria Henrietta
SDD: Nancy Lena Eileen Ellen Kathleen Audrey
DS: Charles James Robert William John Richard
DS: Paul Harold Thomas Arthur Albert Ralph
DD: Eugenia Lenora Estella Olivia Adelaide Cornelia
DD: Dorothy Helen Margaret Ruth Virginia Anna
DS: Theodore Gerald Philip Edwin Bernard Herbert
DD: Marie Alice Lillian Louise Catherine Marjorie
DS: Regis Alois Elisha Mortimer Sylvan Marcellus
DD: Antonia Aurora Philomena Elisabeth Katharine Althea
DS: Hugo Elias Junius Gregory Ferdinand Columbus
DD: Veronica Angelina Gloria Isabel Rosalie Cecelia