Names for characters in a story?

Okay so I'm staring to write a story called Footprints In The Sand. I want the names of the two main characters to be different and I need an opinion.Elicea Ella Cartwright and her brother Aiden Ellice Cartwright and the other to characters Haiden Hael Ashford and his sister Melody Annabelle Ashford. I Like them there, different I think to say the least, but to me that makes them unique and stand out more. Although unique I think there nice names.