From a friend:

A worthwhile resource for anyone with an interest in Celtic prayers and blessings is Alexander Carmichael's "Carmina Gadelica: Hymns and Incantations" which contains hundreds of items from the Scottish Highlands and Islands. There's even a few household blessings - although the Highlanders/Islanders would have used them as a regular ward against evil influence rather than "just" a blessing on a new home.

Here's a blessing from that collection...

May the everlasting Father Himself take you,

In His own generous clasp,

In His own generous arm,

May God shield you on every steep,

May Christ keep you in every path,

May the Spirit bathe you in every pass