Post Your Granted, Assumed or Desired Arms

[MacMillan of Rathdown]

Well done, Mr. Henry!
I have a question though: is it common for Lutheran ministers to have crests, or is the crest for use by your lay heirs?

There is nothing unusual about members of the clergy having crests, regardless of their denomination. Likewise, when arms are granted (or assumed) it is traditional that the crest be depicted on top of a helmet, which may be shown on top of the shield, or placed elsewhere on the letters patent if that is the request of the client. Likewise, should the client request that the helmet be omitted from both the exemplification and text of the letters patent then the crest, resting upon a wreath of the appropriate colours, would be depicted either above the shield, or somewhere in the margins of the document.