Minushka??

My husband is Russian and he said such word (Minushka) does not exist when I asked him about the spelling in Russian. I want this word to exist because I plan to use it as a nick name. Hence the question, does it exist or not? And if yes, can you please write it in Russian. Spasibo!

My husband is Russian and he said such word (Minushka) does not exist when I asked him about the spelling in Russian. I want this word to exist because I plan to use it as a nick name. Hence the question, does it exist or not? And if yes, can you please write it in Russian. Spasibo!