Whys does Federico García Lorca give out nature names?

This could be so that the character are genderless. The reasoning behind this is that Lorca was homosexual and may of thought that genders were not important. It also in addition maybe showing the wants of everyone at the wedding as they all want everything to be calm and relaxed like a forest. In contrast they already maybe like it as the moon is being very spiteful and it helps in the deaths at the end.