The House of Tyszkiewicz was a wealthy and influential Polish-Lithuanian magnate family of Ruthenian origin, with roots traced to the times of the Grand Duchy of Lithuania. They held the Polish coat of arms Leliwa. Their nobility was reaffirmed in Polish–Lithuanian Commonwealth and the Russian Empire.

Leliwa is a Polish coat of arms. It was used by several hundred szlachta families during the existence of the Kingdom of Poland and the Polish–Lithuanian Commonwealth, and remains in use today by many of the descendants of these families. There are several forms of the arms, all of which bear the name, Leliwa, but which may be distinguished as variations of the same arms by the addition of a Roman numeral. In 19th century during a pan South-Slavic Illyrian movement heraldic term Leliwa also entered Croatian heraldry as a name for the coat of arms considered to be the oldest known symbol; Bleu celeste, a mullet of six points Or surmounted above a crescent Argent – A golden six-pointed star over a silver crescent moon on a blue shield, but also as a name for all other coats of arms that have a crescent and a mullet.