What do you think of these names?

I think these are very attractive names. I like the traditional names Elaine and Daniel as middle names and the more modern-sounding names Sierra and Josiah as first names . . . so go for it! You and your husband, after all, have the final say and you shouldn't worry about too many people's opinions. Who will be using these names on a daily basis? You and your husband, so you should go with what you like the most. Stick with them! :-)