Henry's children were John, Henry Jr.,Daniel, Samuel, David, Elizabeth, and Mary.
In Preble probate records for a Daniel Landis Henry was spelled Lantis on 9-23-1814 and Landis in next record on 11-15-1814.
Our Library has several books put out on the Landis Family reunions in the 1940's and 50's this is what one says about the name.
The Spelling of the Name
Landes Landis Landers Lander Landas Landus
The original Swiss spelling of the name is Landis. There are those still living in Switzerland by this name. As families were driven from that land by edict and religious persecution, the logical path was down the Rhine River into Germany and the Low Countries, About three generations of the family lived in Germany before migration began In earnest to the New World. In Germany they adopted the spelling of the name dictated by the German Language, being Landes. As things began to open up In the American Colonies, many families accepted the invitation of William Penn to come to a land of religious liberty. In this their adopted country, they met with more language problems as the civil authorities were English. This accounts at least partially for the various spellings for the name on legal documents. We have found all of the above spellings on legal documents of the early generations of our family. The most used spelling we find for Jacob and his sixteen children is Landers, Today spellings have become more stabilized, but there have been a few members of the family that have changed to the Landis spelling. This is evidenced in the Stillwater Cemetery where tomb stones of brothers are spelled different ways. I might add, that when Fellx signed his own name it was always spelled with an 'e'. The markers erected for our direct line are all spelled the same. Regardless of the spelling, the name means "one living on or near the cultivated field"