Anna Judith Hora Siccama (1828-1910) (1828–1910) Parents Jonkheer Jean Herman Martens Hora Siccama Isabelle Antoinette Barones van Imhoff Children Cornelis Jacob Speelman Jkvr. Isabelle Antoinette Speelman Partners Jonkheer Maj.-Gen. Sir Cornelis Jacob Abraham Speelman, 5th Bt.