IOAN [Ivanco] Bassaraba "cel Mare/the Great" (-1352). Voivode of Wallachia. m ANA, daughter of ---. Ioan & his wife had [two] children:

a) NICOLA ALEXANDRU Bassaraba (-16 Nov 1364). Voivode of Wallachia. m firstly MARIA, daughter of ---. m secondly CLARA de Doboca, daughter of ---.
Nicola Alexandru & his first wife had children:

i) ELISABETH Bassaraba ([1340]-[1367/69]). m ([1352/55]%29 as his first wife, WLADISLAW Duke of Oppeln Palatine of Hungary, son of BOLESLAW II Duke of Oppeln [Piast] & his wife Elisabeth von Schweidnitz [Piast] ([1326/30]-8 or 18 May 1401).
ii) RADU Bassaraba (-[1383/3 Oct 1385]). Voivode of Wallachia.

- see below.

Nicola Alexandru & his second wife had two children:

iii) ANA [Slava] Bassaraba (before [1345]-). m (before 1369) [her first cousin?,] IVAN STRACIMIR Tsar of Vidin, son of IVAN ALEXANDER ASEN Tsar of the Bulgarians & his first wife Teodora Bassaraba of Wallachia (-after 15 Sep 1396).
iv) ANA [Anka] Bassaraba ([1345]-). This marriage was probably intended to seal a Serbian/Wallachian alliance against Hungary[1143]. m (Jul 1360) STEFAN UROŠ IV Tsar of Serbia, son of STEFAN DUŠAN Tsar of Serbia & his wife Jelena of Bulgaria ([1 Sep 1336/31 Aug 1337]-3 Dec 1367 or 1371).

b) [TEODORA Bassaraba (-after 1340). She became a nun as THEOFANA. m ([1320], repudiated 1340) as his first wife, IVAN ALEXANDER ASEN Tsar of the Bulgarians, son of STRACIMIR despot & his wife Kereza Petriza of Vidin (-17 Feb 1371).]

http://fmg.ac/Projects/MedLands/HUNGARY.htm#Radudied1383A

-https://en.wikipedia.org/wiki/Basarab_I_of_Wallachia