Vincenzo de Marco, married to Antonia de Marco, with issue.

1. Giuseppe de Marco, married 1845 Valletta to Elisabetta Gemma (d/o Salvatore and Caterina Xerri), with issue.

1.1. Salvatore de Marco, married 1895 Valletta to Susanna Zammit (d/o Pietro Paolo and Adelaide Galea), with issue.
1.1.1. Emanuele de Marco married 1927 Valletta to Giovanna Raniolo (d/o Francesco and Consolata Presti)., with issue.
1.1.1.1. Prof. Dr. Guido de Marco, B.A, LL.D, President of Malta, (1931-, married to Violet Saliba, with issue.
1.1.1.1.1. Dr. Mario de Marco, B.A, LL.D, MP and Parliamentary Sec. for tourism.,  married 2002 to Sharon Cordina.
1.1.1.1.2. Gianella de Marco, B.A, LLD, married to Joseph Caruana Currun.
1.1.1.1.3. Fiorella de Marco, B.A, LL.D, married to Perit Paolo Camilleri, with issue
1.1.1.1.3.1. Federica Camilleri de Marco

1.2. Vincenzo de Marco, married to Elvira Camenzuli, with issue.

1.2.1.  Emanuele de Marco, married to Beatrice Magri, with issue.

1.2.1.1. Roland de Marco, (1909-96), married 1941to Pietra Mifsud, with issue.

1.2.1.1.1. Elizabeth de Marco, (1948-., married 1970 to Peter George Micallef.

1.2.1.2. Joseph de Marco.

1.2.1.3. Lilian de Marco.

1.2.1.4. Marie de Marco.

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