"For God so loved the World that he gave his only begotten son, so that whosoever believe in him will have everlasting life"
The word begotten (past participle of beget) commonly appears in statements about how God and Jesus Christ are supposedly related, and emphasises the metaphysical, as opposed to physical, relationship between the two.
Begotten, while being an archaic equivalent of born, has subtler overtones of "bring about" with less emphasis on the suggestion of (natural) birth when describing this relationship.
The use of begotten is also a strong indicator of a Christian bias, as it appears as a very common example of a meme that shows the influences of Christian doctrine. When people in English-speaking countries are asked "Who is/was Jesus?", a common answer is a paraphrasing of "Jesus is/was the only begotten son of God", rather than the simpler statement "Jesus is/was the son of God".