Jekaterina is not a popular first name. It is more often used as a girl (female) name.
First names and their meaning - Page 2697
Jiayi
Jiayi is not a popular first name. It is more often used as a girl (female) name.
Konnor
Origin: Scottish-Gaelic. 
Meaning: Lover of hounds, Hound nobleman. 
Konnor is not a popular first name. It is more often used as a boy (male) name. 
Kostis
Kostis is not a popular first name.
Lain
Origin: Basque. 
Lain, Layn or Lain may refer to: 
Lakasha
Lakasha is not a popular first name. It is more often used as a girl (female) name.
Lurlean
Lurlean is not a popular first name. It is more often used as a girl (female) name.
Mandela
Mandela is not a popular first name. It is more often used as a boy (male) name.
Marjolaine
Meaning: Marjoram. 
Marjolaine is not a popular first name. It is more often used as a girl (female) name. 
Mikiyah
Mikiyah is not a popular first name. It is more often used as a girl (female) name.