Analysis of information sources in references of the Wikipedia article "List of counties in Iowa" in English language version.
According to most sources, Henry County (440 square miles) was named for Henry Dodge (1782-1867), who served in the Black Hawk War and other Indian wars and governor of Wisconsin Territory (1836-1841); others credit the county's name to General James Dougherty Henry (1797-1834), a hero of the Black Hawk War.
The origin of the naming of Tama County is somewhat disputed. Some authorities say the name comes from Taimah, a Fox Indian Chief. Others say it comes from Taomah, wife of Poweshiek--another Fox Indian Tribe Chief. Still others say the county is named after the Indian Chief Potama or Pottama.
According to some authorities, the county was named for Louisa Massey, who gained fame during her time because she avenged the murder of her brother by shooting the man responsible. Other historians claim the name was given in honor of Louisa County, Virginia. There are 418 square miles (1,080 km2) in Louisa County.
The origin of the naming of Tama County is somewhat disputed. Some authorities say the name comes from Taimah, a Fox Indian Chief. Others say it comes from Taomah, wife of Poweshiek--another Fox Indian Tribe Chief. Still others say the county is named after the Indian Chief Potama or Pottama.