First, let us get the following out of the way:1.Yelena is the standard English transcription of Russian Елена, whilst Jelena is the standard German transcription. In both languages, Elena is merely a variant transcription.2. The modern Russian alphabet does not really have a letter that is equivalent to the Latin letter H. The closest possible letter is Х, which is transcribed as Kh. So no, Helena is not used in Russia. Any Russian Helena that you see on social media has either grown up outside of Russia, or has made a conscious decision to spell their name in that fashion so as to be more "western" and thus appeal to a more international audience.3. Lenja would be written as Леня in Russian Cyrillic. The standard transcription of that is actually Lenya, with Lenia and Lenja being variant transcriptions. Well, for English, that is. For German, Lenja would be the standard transcription, as the Germans transcribe the Russian letter я in names as ja by default.With that said: technically it is certainly possible for Леня (Lenja/Lenya) to be a diminutive of Elena/Yelena, as -я (-ja/-ya) is a diminutive suffix for Russian given names. In other words: the name follows the Russian language's rules for diminutives. But in practice, the name is actually a diminutive of Leonid, meaning that Lenja/Lenya is actually a masculine name in Russia. Any actual use of Lenja/Lenya on Russian women officially named Elena/Yelena is either very rare or completely archaic.Well, to be fair, Russians only use diminutives amongst friends and family. They would never introduce themselves or others to strangers with a diminutive name. So, if you are not particularly close with all the Russian Elenas that you know, then of course you only know them by their official given name.Sources used: - https://imya.com/name/28146 (in Russian) - https://en.wiktionary.org/wiki/-я#Russian (in English) - https://en.wikipedia.org/wiki/List_of_diminutives_by_language#Russian (in English) - Елена (feminine name): • https://ru.wikipedia.org/wiki/Елена (in Russian) • http://kurufin.ru/html/Rus_names/rus_e.html (in Russian; scroll down until you see "Helena" in one of the columns on the right) • http://kurufin.ru/html/Translate/elena.html (in Russian) - Леонид (masculine name): • https://ru.wikipedia.org/wiki/Леонид (in English) • http://kurufin.ru/html/Rus_names/rus_l.html (in Russian; scroll down until you see "Leonides" in one of the columns on the right) • http://kurufin.ru/html/Translate/leonid.html (in Russian)
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