My great-grandfather, William Jacob Ingle, had only one son in 1850, James Blythe Ingle. There is another son, James B. Jarvis/Jervis given as another son born in 1850. Jervis was the maiden name of William Jacob Ingle's wife so he could not have a Jarvis/Jervis son.
Your question is unrelated to this topic. You would have been better to start a new discussion. Perhaps a moderator with sufficient rights will split it off! I lack the power to do so!
To answer your question, it looks like the two are the same person albeit with different surnames. If you are comfortable that this is the case then you can merge the two records. Use the surname that you believe is correct ideally supported by a birth record. The other name can be put in as an alternate if you wish. I had an ancestor who was born out of wedlock but his birth was registered with his father's surname. By the age of 11, he had adopted his mother's maiden name and stayed that way for the rest of his life. Finding his birth record was a headache but that is another story!
To merge records, see the instructions at