How does Matthew and Dorothy mean the same thing?

[SausagePie123]

am I missing something?

They'll be from different origins though.

It's like saying how can blanc and White mean the same thing.

Google suggests that they both mean "Gift of God" - Matthew in Hebrew and Dorothy in Greek.

Cool, thank you

Is it okay to use the names for siblings?

Of course.

And Theodore, which is basically Dorothy re-arranged.

Also Theodora - and Dorothea.