The baby's name is Sai-rung (สายรุ้ง) or literally Rainbow.....consider the fact the father is Meak (เมฆ) a Cloud and The mother is Fah (ฟ้า) as in Sky or color Blue.
As a Thai I read this story since i'm little and only read 3 volumes (4-6) and with your translation I have something to finish for the sake of my childhood....that extra page really brings me back