It seems that the most likely candidate, would have been the Pope. If you think about the complexity with passports and name changes.
The Holy Alliance Treaty is interesting not because of the evidence of timing during the momentum of people leaving the three countries mentioned just after the United States comes into fashion as the hottest spot to raise a family.
Written in 1815
The following text was taken from:
The Holy Alliance Treaty
September 26, 1815
This treaty, drawn up by Tsar Alexander, reflects the return to conservative politics in Europe after the long struggle against Revolutionary and Imperial France. It was subsequently acceded to by all the monarchs of Europe except the King of Great Britain, who declined to sign on constitutional grounds, Pope Pius VII, who refused to treat with Protestant monarchs, and the Sultan of Turkey. Both Castlereagh and Metternich dismissed the wording of treaty as largely meaningless, and it had little influence on the policies of the signatories. Liberals and nationalists hated the Alliance as a symbol of the reactionary Restoration.
The Holy Alliance Treaty
TREATY between Austria, Prussia, and Russia.
Signed at Paris 18 / 26th September 1815.
In the name of the Most Holy and Indivisible Trinity.
Holy Alliance of Sovereigns of Austria, Prussia, and Russia.
THEIR Majesties the Emperor of Austria, the King of Prussia, and the Emperor of Russia, having, in consequence of the great events which have marked the course of the three last years in Europe, and especially of the blessings which it has pleased Divine Providence to shower down upon those States which place their confidence and their hope on it alone, acquired the intimate conviction of the necessity of settling the steps to be observed by the Powers, in their reciprocal relations, upon the sublime truths which the Holy Religion of our Saviour teaches:
Government and Political Relations
They solemnly declare that the present Act has no other object than to publish, in the face of the whole world, their fixed resolution, both in the administration of their respective States, and in their political relations with every other Government, to take for their sole guide the precepts of that Holy Religion, namely, the precepts of Justice, Christian Charity, and Peace, which, far from being applicable only to private concerns, must have an immediate influence on the councils of Princes, and guide all their steps, as being the only means of consolidating human institutions and remedying their imperfections. In consequence, their Majesties have agreed on the following Articles:
Principles of the Christian Religion
ART. I. Conformably to the words of the Holy Scriptures, which command all men to consider each other as brethren, the Three contracting Monarchs will remain united by the bonds of a true and indissoluble fraternity, and considering each other as fellow countrymen, they will, on all occasions and in all places, lend each other aid and assistance; and, regarding themselves towards their subjects and armies as fathers of families, they will lead them, in the same spirit of fraternity with which they are animated, to protect Religion, Peace, and Justice.
Fraternity and Affection
ART. II. In consequence, the sole principle of force, whether between the said Governments or between their Subjects, shall be that of doing each other reciprocal service, and of testifying by unalterable good will the mutual affection with which they ought to be animated, to consider themselves all as members of one and the same Christian nation; the three allied Princes looking on themselves as merely designated by Providence to govern three branches of the One family, namely, Austria, Prussia, and Russia, thus confessing that the Christian world, of which they and their people form a part, has in reality no other Sovereign than Him to whom alone power really belongs, because in Him alone are found all the treasures of love, science, and infinite wisdom, that is to say, God, our Divine Saviour, the Word of the Most High, the Word of Life. Their Majesties consequently recommend to their people, with the most tender solicitude, as the sole means of enjoying that Peace, which arise from a good conscience, and which alone is more durable, to strengthen themselves every day more and more in the principles and exercise of the duties which the Divine Saviour has taught to mankind.
Accession of Foreign Powers
ART. III. All the powers who shall choose solemnly to avow the sacred principles which have dictated the present Act, and shall acknowledge how important it is for the happiness of nations, too long agitated, that these truths should henceforth exercise over the destinies of mankind all the influence which belongs to them, will be received with equal ardour and affection into this Holy Alliance.
Done in triplicate, and signed at Paris, the year of Grace 1815, 14/26th September.
(L.S.) Frederick William
Title: The map of Europe by treaty.
Author(s): Hertslet, Edward Cecil
Description: 4 v. (xxxvi, 3380 p.): maps (some folded); 26 cm.