Is there a website specialized in girls' names and their meanings to avoid choosing a name that involves polytheism (shirk) or the like?

You can benefit from websites and pages specializing in name selection, while being careful to ask scholars about the permissibility of using the chosen name. Furthermore, Sheikh Bakr Abu Zayd's رسالة (treatise) "Tasmiyat al-Mawlud" (Naming the Newborn) clarifies the guidelines for choosing names and contains a list of suggested names.