@ maxx
It is quite difficult to answer exactly when and where, which can trace back to when the popular cutty clay pipe shape faded and the billiard took over. A bit of search gave me the information:
"... The Lovat is named after the various lords and barons Lovat (Lordship of Lovat), such as Brigadier-General Simon Joseph Fraser..."
http://thepipeguys.com/smoking-pipe-shapes-guide/#5473-smoking-pipe-shapes-guide/1/11711-lovat
Basically it belongs to the Canadian pipe family (long shank Billiard shape family: Canadian, Lumberman, Liverpool, Lovat).