In reading about William Penn, he mentions "Leidger", in a context that made me think it had something to do with theology.
" It is of that Moment to us in Reference to both Worlds, that I can hardly wish any Man better, than that he would seriously consider what he does with his Time: How and to What Ends he Employs it; and what Returns he makes to God, his Neighbor and Himself for it. Will he ne’er have a
Leidger for this? This, the greatest Wisdom and Work of Life."

But in searching for "Leidger", instead of a person, I found what seems to be a title of some sort.

Sir Henry Unton was elected Knight of the Shire for Berkshire in the Parliament of 1593. In December 1595, he went again as Ambassador to France. In a letter to the Lord Treasurer of the 17th March following, he mentions that he had then been, for some days, suffering from a malignant fever and had been abandoned by his physicians. He died on the 23rd of the same month. His body was brought to England and, in consequence of his dying in the dignified position of Ambassador Leidger, his funeral honours were the same as those usually paid to a Baron

So now I've got to go search some more.

Don't know whether this is related, wwh, but here's a paste from Dictionary.com:

leiger

Leger \Leg"er\ (l[e^]j"[~e]r), n. [See Ledger.] 1. Anything that lies in a place; that which, or one who, remains in a place. [Obs.]

2. A minister or ambassador resident at a court or seat of government. [Written also lieger, leiger.] [Obs.]

Sir Edward Carne, the queen's leger at Rome. --Fuller.

3. A ledger.

I wonder, Dr. Bill, whether it is a old-fashioned spelling of ledger, the idea being that you should keep some sort of ledger showing what you have received from God, and your neighbours, and what return you have given them. Do the books balance?

Bingley

OED1 lists leidger as a variant of ledger and one of the definitions of ledger is [a]n ordinary or resident ambassador; also, a papal nuncio.