Here are the known 'Capostipe' (heads of branches) for branch X - Unknown Origin
- X1 - George Germonte (#3257) (1884 - ) Descendants - Unknown Origin
- X2 - Saveria Girimonte (#539) (1915 - 1987) Descendants - Unknown Origin
- X5 - Domenico Girmondi (#3664) (1892 - ) Descendants - Unknown Origin
- X6 - Domenico Germonte (#3665) (1871 - ) Descendants - Unknown Origin
- X7 - Elisa Girimonte (#3692) (1976 - ) Descendants - Unknown Origin
- X8 - ? Girimonti (#3075) ( - ) Descendants - Unknown Origin
- X9 - Francesco Girimonte (#2936) (c1853 - ) Descendants - Unknown Origin
- X10 - Michael Germonte (#3647) (1867 - ) Descendants - Unknown Origin
- X11 - Andre Geramonde (#3650) (1881 - ) Descendants - Unknown Origin
- X12 - G. Giramonte (#1804) (c1858 - ) Descendants - Unknown Origin
- X13 - Antonio Girimonte (#3659) (1900 - ) Descendants - Unknown Origin
- X14 - Nicola Geramonti (#2957) (c1891 - ) Descendants - Unknown Origin
- X15 - Eugenia Ierimonte (#3622) (c1754 - ) Descendants - Unknown Origin
- X16 - Melchiove Girimonti (#3462) (c1882 - ) Descendants - Unknown Origin
- X17 - Maria Girimonte (#3584) (c1830 - ) Descendants - Unknown Origin
- X18 - Seb. Geramondi (#2961) (c1884 - ) Descendants - Unknown Origin
- X19 - John Germanti (#719) (c1877 - ) Descendants - Unknown Origin
- X20 - Salvatore Girimonte (#541) (1912 - 1964) Descendants - Unknown Origin
- X21 - Salvatore Geramondi (#3133) (>1883 - ) Descendants - Unknown Origin
- X22 - Francesco Girimonti (#2966) (c1858 - 1914) Descendants - Unknown Origin
- X23 - Margarita Ierimonte (#3626) (c1913 - 1989) Descendants - Unknown Origin
- X24 - Antonio Girimonte (#3129) (>1899 - ) Descendants - Unknown Origin
- X25 - Silvio Jiramonti (#3234) (c1884 - ) Descendants - Unknown Origin