Complex sentence: Its first recorded name "Æglesburgh" is thought to mean "Fort of Ægel", though who Ægel was is not recorded since earliest records there have been 57 variations of the name.
Split into simpler sentences: Its first recorded name "Æglesburgh" is thought to mean "Fort of Ægel", though who Ægel was is not recorded. Since earliest records there have been 57 variations of the name.