tbh, when Chloe was born, they seemed pretty content just having the girls names end with the letter E - although it always surprised me that they spelled Aimee with double Es, rather than spelling it Aimie or Amie - both of which are accepted spellings of the name, unlike their hashed version of Heidi! it's the same with Phoebe - she's one of the younger girls, yet they were happy to ditch the "ie" pattern - which by that point had become more prominent amongst the girl's names - which is lucky, or the poor kid could have ended up being named Phoebie - but it leaves the question as to why they used the spelling HeiDIE. it f they wanted to name her Heidi, but were desperate to have the name ending in an E, why not opt for the spelling Heidee? sure, it's not great, but it's certainly preferable to Hei-die, and would have fit with Aimee, Chloe and Phoebe, which all just end in an E.