Interactieve boom van Henrica Roelofs

Theodorus Holtus 1830–

Johannes Hendrikus Holtus 1861–1874

Johanna Maria Catharina Holtus 1863–

Catharina Wilhelmina Holtus 1866–

Hendrikus Holtus 1831–

Wilhelmina van Driel 1821–1871

Rutgerus Holtus 1833–

Stephanus Holtus 1835–

Catharina Janssen 1800–1836

Hendrikus "Hendrik" Holtus 1800–1863

Henrica Roelofs –

Theodorus Janssen –