Career
He was Grand Marshal of Lithuania (1434-1459). Mantigirdaitis was one of the sons of Matigirdas, regent of Polotsk. He was first mentioned in the 1413 Union of Horodło where he received the Wadwicz coat of arms.
In 1422-1423 he was Grand Duke"s marshal.
Around 1424 he became regent of Podolia, but lost this post in 1426. He was regent of Navahrudak (1430-1432 and 1445-1456) and Polotsk (1459).
He supported the 1432 coup against Švitrigaila and commanded troops of Sigismund Kęstutaitis in the Lithuanian Civil War (1431-1435). Mantigirdaitis was married twice.
The name or origin of the first wife is unknown.
They had one son Jonas, who was not active in politics and possibly died young. This marriage was childless. His main estate was in Iwye in present-day Grodno Region, Belarus (it was granted to him in 1434 by Sigismund Kęstutaitis, but it could have been a confirmation of his patrimonial rights).
Mantigirdaitis had other landholdings near Šalčininkai and Ashmyany.