Yeah, Pichi's Mr Pea is Xander with an X.
Zander sounds good with your other two though. I like really old fashioned names, but there is a fine line. I like Elsie for another girl, and think it goes well with Edie, but my friend told me it reminded her of an old lady at a care home she used to work at who always smelled of wee. I also wanted Eloise for a girl, but Mark has put his foot down at that as well, saying it sounds too much like Louise and he doesn't like Louise. I like Iris, but no. We had this with boys names when I was pregnant with Edie, but we had settled on Edie when I was around 20 weeks.