I have seen alot of posts over the years in this and other forums asking about the alledged Hauck coat of arms. Be aware that the coat of arms showing a central lion flanked by two others with a rose laurel on top of the coat of arms is a fake.
The story that goes with it is that in 1095 A.D. a German knight by the name of Johann Georg Hauckhe was granted a coat of arms from his Holiness Pope Urban II before he went off to fight in the second crusade.
In a visit to the Staat-Archiv in Ludwigshafen, I met a researcher who specialized in Heraldry. He identified this coat of arms as a fake right away. First, the coat of arms as shown is (using his words) "too elaborate and ornate for the times". Second and the biggest clue is that of the alledged knight. Very few people in the 11th century had a second name in Germany unless they were high born. Usually they were named for a village, region, castle or the like.
There is another coat of arms being marketed by the folks in Ohio which shows a central lion holding a staff or axe. The researcher looked in all of the records he had and was unable to verify that this coat of arms was ever issued.
In my own research, I was able to find only one knight between the 11 and 14th century with a name similar to Hauck, he was alive in the late 13th century and was involved in a tournament. His "last name" was that of a region in Germany and his coat of arms was totally different from anything described above.