EXCLUSIVE

Ginnifer Goodwin gave birth to a healthy baby boy last week ... and TMZ has obtained the birth certificate that reveals a tie-in to the first family of reality television.

According to the certificate, Goodwin and her "Once Upon a Time" co-star/husband Josh Dallas named their boy Oliver Finlay Dallas. Goodwin popped out little Oliver at Cedars-Sinai Medical Center ... the hospital to the stars.

But the birth certificate also revealed this nugget ... the baby was delivered by Dr. Paul Crane ... who made several appearances on "Keeping Up With Kardashians" because he was the doctor for both Kourtney and Kim during their pregnancies.