The form used in Irish is Heather as in English.
i wanted to know how to say the name heidi in Chinese
There is no god with the name Heidi so I will have to say that Heidi is not a god.
Heidi Fugeman's birth name is Heidi Mary Fugeman.
Heidi Wilde's birth name is Heidi Andrus.
Heidi Graf's birth name is Heidi Schalk.
Heidi Cat's birth name is Heidi Nelson.
heidi is a girls name
Johnson is not an Irish name. This is not to say there are not Johnsons with Irish ancestry. So no Irish county is associated with the name Johnson.
Heidi Satter's birth name is Heidi Jo Satter.
Heidi Berry's birth name is Heidi Marie Berry.
Heidi Range's birth name is Heidi India Range.
Heidi Sibelius's birth name is Heidi Kristina Sibelius.