Hardt, Das Geschlecht Hardt aus Lennep, o. O. [ca. 1950], S. 67
C. Pick, Familienbuch Lennep 1654-1809, Plaidt 2014, S. 1069
___________________ | ____________________|___________________ | ___________________| ___________________ | | | | |____________________|___________________ | Johannes HASSELKUS | ___________________ | (1669-1731)x1692 | | | | ____________________|___________________ | | | | |___________________| ___________________ | | | | |____________________|___________________ |--Clara HASSELKUS | (1702-1770)x1725 Peter HÖLTERHOFF | | (1595-1677)x1620 | Peter HÖLTERHOFF | Katharina | | (1622-1674)x1645 (1600-1680) | Peter HÖLTERHOFF | ___________________ | | (1646-1710)x1672 | | | | | Margaretha |___________________ | | (1626-1673)x1645 | Katharina HÖLTERHOFF | ___________________ (1672-1726)x1692 | | | Johannes SPIECKER |___________________ | | (1617-1696)x1644 | Anna SPIECKER | ___________________ (1647-1713)x1672 | | | Anna |___________________ (1615-1698)x1644