Doctor Viktor Lozinak (a.k.a. Fyodor Leonov) was a Human geneticist from Ukraine. In 1974, he was one of many scientist who went missing, only to turn up in the employ of the Chrysalis Project. He met Roberta Lincoln in Rome to offer her a job. He was fond of spaghetti with clam sauce. He had a glow-in-the-dark mouse. (TOS novel: The Rise and Fall of Khan Noonien Singh, Volume 1)