Theressa is not a popular first name. It is more often used as a girl (female) name.
First names and their meaning - Page 1714
Tyanna
Tyanna is not a popular first name. It is more often used as a girl (female) name.
Zenon
Origin: Basque. 
Meaning: Stranger. 
Zenon (Ancient Greek: Ζήνων) is a masculine given name of ancient Greek origin. It means "belonging to Zeus", "Zeus", "divine". 
Agneta
Meaning: Chaste, Pure. 
Agneta is a given name of Scanadivanian origin. Those bearing it include: 
Aleen
Origin: Scottish-Gaelic. 
Meaning: Noble, Good-looking. 
Aleen is not a popular first name. It is more often used as a girl (female) name. 
Anjar
Anjar is not a popular first name.
Apurba
Apurba is not a popular first name.
Excel
Excel is not a popular first name. It is more often used as a boy (male) name.
Geof
Geof is not a popular first name. It is more often used as a boy (male) name.
Guri
Origin: Hebrew. 
Meaning: My lion cub, Hindu goddess of plenty. 
Guri is not a popular first name. It is more often used as a unisex (male and female) name.