David Johnston was born in 1787 in Georgia. He moved to Plaquemines Parish where he was a riverboat pilot. He married Hannah Fredericka Hoffman in 1840 and they had one son named Alexander Henry. Alexander was born in 1841. David died in 1852. Alexander & Hannah moved from Plaquemines. In 1863, Alexander married Magdalena Sherwood Keisel. After Alexander's death in 1869 Magdalena married Luke Higgins in 1874. Hannah also married Mathew Weisheimer.