Dimitri, son of Constantin was in exile 1688-1710 in Constantinople (now Istanbul) before was again voivode of Moldavia for one year. Dimitri escaped after 1711 to Russia.

Constantin Cantemir - Moldavian Voivode (Prince) between June 25, 1685 and March 27, 1693.:
http://en.wikipedia.org/wiki/Constantin_Cantemir
his son Antioh Cantemir(d. 1726, Golia Monastery:http://en.wikipedia.org/wiki/Antioh_Cantemir
his son Dimitrie Cantemir - 1673 – 1723:
"Born in Silişteni (renamed Dimitrie Cantemir and now located in Vaslui County, Romania), Dimitrie was the son of Moldavian Voivode Constantin Cantemir (and brother to Antioh Cantemir, himself Prince), of the low-ranking boyar Cantemireşti family. His mother, Ana Bantăş, was a learned woman of noble origins. Cantemir never forgot his paternal ancestry, but while in Constantinople because of his name similarity locals inspired him to claim descent from Khan Temir, an early 17th century khan of the Budjak Tatars – see Moldavian Magnate Wars' on some occasions'.....during his stay in Constantinople, he also served as a hostage in order to vouch for the loyalty of his father to the Ottomans. he served as a mediator for Ottoman educated to European culture. He was friend with the Grand Vizier and writer Mehmed Pasha Rami. In 1710 he returned to Moldova as voivode." (some parts of german Wikipedia)
http://de.wikipedia.org/wiki/Dimitrie_Cantemir
http://en.wikipedia.org/wiki/Dimitrie_Cantemir
his grandson Antiochus Kantemir - 8 September 1708 – 31 March 1744:
http://en.wikipedia.org/wiki/Antiokh_Dmitrievich_Kantemir

read some history of the time before:
Tartars and Cossacks > Moldavian Magnate Wars
http://en.wikipedia.org/wiki/Moldavian_Magnate_Wars