From Wiktionary, the free dictionary
тоно́в • (tonóv) m inan pl
- genitive plural of тон (ton, “(all meanings)”)
то́нов • (tónov) m inan pl
- genitive plural of тон (ton, “tone (sound)”)
тоно́в or то́нов • (tonóv or tónov) m inan pl
- genitive plural of тон (ton)