I am Filipino with Japanese blood and ancestry. I don't know how much Japanese is in my blood but when I was born, my mother named me Yurishiko. I just wanted to know if my name is Japanese as it sounds a little unusual. I did not find any other Japanese people online with the same name as me. Is Yurishiko a Japanese name?
As @AeonAkechi says, the name definitely has a Japanese ring to it.
However, Yurishiko doesn't seem to be a standard romanization of a common Japanese name, as ゆりしこ as a name is very uncommon (if it exists at all).
That said, it could well be related to the name ゆりひこ, which would be Yurihiko in standard romanization and could for example be written 百合彦 or 由利彦.