"[Marriage of] Broom, John, [of] Pennsylvania, and Sarah Isdall, [of] Burlington 1775 June 19"
https://archive.org/details/marriagerecords101nels/page/34/mode/1up...
Thank you, Perry Streeter Fixed.
Perhaps the surname error perpetuates from https://www.findagrave.com/memorial/66575060/anna-helms-hargett
“She was the daughter of John Broom and Sarah Isdall Burlington. … “
Thanks! Will attempt an update there too :)