Juunei-An

Juunei-An, otherwise known as Emmett Klaus Spitzer, was a lizardperson living in southern Germany who died of natural causes in the late 2280s. He is the seventh-great-grandfather of Silas Spitzer, and the eighth-great-grandfather of Andreas and Jonas Spitzer. It is effectively impossible to trace the Spitzer lineage farther back.

Canon notes
Not much of Juunei-An's life is known. He was born in the mid 2220s in the system of Abarthe, and migrated in the early 2250s as a stowaway on a shuttle bound for Germany, presumably with his mate. It is strongly believed that he wasn't very fluent in the German language, or Galactic Common.

Juunei-An's scale colour is believed to have been a faded olive colour, with brown eyes. Old medical records indicate he stood a hefty 2.2 metres tall, and weighed approximately 110 kilograms.

Spitzer lineage
When Juunei-An arrived on Earth, it is said he adopted or was given the name Emmett Klaus Spitzer to fit in better.

Due to the convention of his birth name, which uses a family name and a clan name (both of which are often shared), it's extremely difficult, if not impossible, to accurately trace the Spitzer heritage past Juunei-An.