Yes, Rogers Harrison Galt, Commodore, USN, b 1850, d 1910, is a grandson of Alexander Galt and Mary Silvester Galt. I am not a relative, but, as volunteer assistant to Richard Austin, curator emeritus of Historic St Luke's Church in Isle of Wight Co, VA, I have researched Gabriel Alexander Dickie Galt, a first cousin once removed of R H Galt, GAD Galt was a surgeon in the CSA, improved the trephine, a surgical tool. Alexander Galt moved from Williamsburg to Norfolk. GAD Galt was born in Portsmouth. Very detailed family tree printed in the reference in my previous post.