Can anyone help me on these addresses (all I have) in Riga please?

1)Sbronaya 58, Riga and 2) Jekapilsskaya 8, Riga

I have no other information except that this is where my great grandfather =
lived but am unable to locate it in Riga, despite exhaustive searches.

Thank you.

Geraldine Courtney
UK
Researching MARK Lithuania, Estonia & Latvia