One of the common difficulties you encounter when travelling in a place where the language as well as writing system is different is that some places have more than one transliteration into your language, say, English for example. This is compounded by the existence of multiple names for a single site, as indeed may be seen in the case of Jaipur’s Birla Mandir. A bit of knowledge can help: for example, “mandir” stands for any place of worship, so this place is also known as the Birla Temple of Jaipur. Most temples in India are also named after the deity to whom they are dedicated, so if we take into account that this particular mandir is dedicated to the deity “Lakshmi Narayan”, it may be referred to as the Lakshmi Narayan Temple. All the other transliterations along the same vein are correct, including Laxminarayan, Lakshminarayana, etc.
Something of note to those unfamiliar with the Hindu gods is that Lakshmi Narayan refers specifically to the god Vishnu or Narayan …