Passage: Vectomov's initial music experiments began during the 1980s in Finland and involved musique concrète with home tape recorders, four years of performing and touring with the children's choir Vox Aurea under the direction of Kari Ala-Pöllänen, and violin and piano studies under a curriculum for precocious children at Keski-Suomen konservatorio, where her father Vladimír Večtomov taught classical guitar. Her grandfather Ivan Večtomov, also a composer, was a cellist with the Czech Philharmonic for 22 years, and her uncle was the cellist Saša Večtomov.During the mid-1990s, Vectomov moved to Prague to assume a 1st violin chair with the Pražský studentský orchestr under the direction of Mirko Škampa. Concomitantly she monitored the electronic music scenes in Finland and England.As a solo artist Vectomov's concerts sometimes involve elements of installation, e.g., the transformation of a stage into a salon. She has stated that Conlon Nancarrow and David Byrne are important influences.

Question: what was the name of her grandfather?
Ivan Večtomov