Birth Certificates of Siblings Help Crack Mysteries

A few people in my tree I've been unable to advance on because there were two or three others with the same name born around the same time, I've had the idea of obtaining the birth certificates of siblings with more unusual names.
Finding the birth certificate of my great grandmother, Emma Oxley (born 1851 in Sheffield), in order to obtain her mother's maiden name, was proving difficult, so I ordered her brother's (Isaac Oxley b 1839) certificate.
It arrived this morning, and I now know that my great GREAT grandmother was Ann Walker!

Hopefully another two will arrive tomorrow and two more mysteries will be solved!