Try this one in the Uk.....https://www.wired.com/2016/08/brilliant-sorcery-englands-7-circle-magic-roundabout/

They do seem to be spelling variations as you suggest; google "Old English pronoun who" for lots of complicated details! I wish I'd paid more attention grammar at school; its a fascinating subject :-)

Theres an modern to old English tanslator that provides even more options at
http://www.oldenglishtranslator.co.uk/

hwa Pronoun who what - interrogative pronoun nominative masculine feminine
hwá Pronoun who what - interrogative pronoun nominative masculine feminine
hwone Pronoun who what - interrogative pronoun accusitive masculine feminine
hwæne Pronoun who what - interrogative pronoun accusitive masculine feminine
hwæt Pronoun who what - interrogative pronoun accusitive nominative neuter
hwæs Pronoun who what - interrogative pronoun genitive
hwám Pronoun who what - interrogative pronoun dative
hwæm Pronoun who what - interrogative pronoun dative
hwy Pronoun who what - interrogative pronoun instrumental
hwon Pronoun who what - interrogative pronoun instrument