Welcome to the forums.
Please do not post the same request several times. One post is enough, and other duplicates get deleted.
According to the way you detailed the prunounciation of Rodrigo, here is its equivalent in Arabic:
هوضريغو
We do not have a G letter in Arabic, so we replace it with a close one in transcription.
One last note, most members here feel uneasy with names' transcriptions when they are for tatoos, since they are forbidden in our religion. You guys should consider Henna tatoos
.