Bydand

I was looking up the surname of my mother's father's mother,
and came across the motto of the Highlander family name.
Bydand. 
I didn't know what it meant.
Do you?

There are differing theories about its meaning.
My favorite is that it is a corruption of a Gaelic term
meaning 'steadfast, abiding, faithful'.
In Him we have an abiding hope,
a steadfast anchor within the veil,
a faithful High Priest.

I think I like it better than the motto from my father's father,
which translates 'One king, one faith, one law.'