This pre-1500 profile has a problematic first name and LNAB. I can't change it as I am not certified, so I hope someone who can could be kind to check it.
If Gräsmyr (the place where he lived) is kept at LNAB, first name needs to be altered to Swedish; "Tomas i". It is plausible he was called "Tomas i Gräsmyr" , but never (English) "Tomas in Gräsmyr".
But, strictly, if he ever was called "Tomas i Gräsmyr"; that is an acquired name and Gräsmyr should not be used as LNAB at all... Even though I can see the point in bending the rules to distinguish him from all other Tomas Unknowns.