The lineage has been traced. Maybe this post will help your own research.
Born in about 1241 in Castile, Spain, she married Edward I of England in 1254. He became king in 1272 and was crowned in 1274. She died in 1294 after giving birth to fourteen to sixteen children.
He lived from 1239 to 1307. He married Eleanor of Castile. Included is the opening of Edward’s tomb in 1774. This post also includes various genealogical tables by top-ranked Medievalists. Updates of new data on kids.