Name from findagrave.com entry for daughter found in March 2021:
Name: Martha Grylls
Birth Date: 1881
Birth Place: Waikato, New Zealand
Death Date: 1 May 1936
Death Place: Thames, Thames-Coromandel District, Waikato, New Zealand
Cemetery: Manunui Cemetery
Burial or Cremation Place: Manunui, Ruapehu District, Manawatu-Wanganui, New Zealand
Mother: Diana Mcgiven Cribb
Spouse: Edwin Charles Grylls
Children: John Richard Grylls
URL: https://www.findagrave.com/memorial/88477321/martha-grylls