Last name Sittard (Secretarium 
, Sittard 
) , in all the world, is a rare surname. The cognomen Sittard is characteristic of Germany, where it is a rare surname, Netherlands, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Secretarium | United Kingdom |
| Sittard | United States, United Kingdom, Germany, Netherlands |
| catharina van voorne vrouwe van born en sittard (1305-1366) (b. 1305) |
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| matthias von sittard Czech Roman Catholic priest, NL (b. 1522) |
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alfred sittard German musician, organist, singer, choir director, composer and music educator (1878-1942), DE (b. 1878) |
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| josef sittard German musicologist, DE (b. 1846) |
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| johannes sittard German businessman (b. 1943) |
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| leonhard de sittard Roman Catholic bishop |
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