Cadi
Katie < Katherine < Catherine < Greek Aikaterna (possibly 'pure').It was borrowed into Welsh as Catrin with Cadi as a diminutive.
yes
her sister is Katie welsh
her sister is Katie welsh
"You are Welsh" = Rwyt ti'n Gymreig
'Our Friends' in Welsh is 'Ffrindiau Ni' :)
To say "your house" in Welsh, you would say "eich tŷ".
Cymraeg
No in Welsh is dim.
Katie.
"y diwedd" is how you say it in Welsh language.
In Welsh, you would say "Rwy'n cytuno" to say "I agree."