"This is a Slavic suffix, the Roman letter ends in -va, and is specially used to name women" is not entirely correct.
In fact, men in Russia and Eastern European countries The surnames of men often end with "-v", such as Gorbachev. And the man's wife and daughter all have the man's surname, and her surname is the feminine version of the man's surname = just add "a" to the end. This is just a change in part of speech, not "Specially used to name women". For example, Maria Sharapova's father (Yuri Sharapov), Maria Sharapova's surname = her father's surname Sharapov+a, becomes "baby".
va and wa have similar pronunciations, so they are translated as "baby" in translation. In fact, there are not many "baby" in the United States. Sharapova immigrated to the United States but still maintains Russian nationality, so the "baby" in the United States is still Russian and Eastern Europe. Since we are Slavs, we must abide by the rules of the Slavic language. This is not a matter of customs.