Many captains brought their families. Most brought their male family members. Echeverz brought at least 4 of his sons - probably all 5 - for the 1715 fleet. Two were captains of ships, one was a "cadet" who helped his father salvage after the wrecks & the other was listed on a ship but without mention of rank. A fifth son was probably with them as well though he's not mentioned in documentation related to the fleet, but definitely went on to live & take his father's place as Audiencia in Panama later. The 1960s-1990s research claimed that both captain sons died, but that's impossible as the eldest was an eye witness to Jennings' first raid & gave deposition then went on to become a governor somewhere in S.America in later years.
The Marquis de Torres (gov of Cuba) sent at least one or two sons with the fleet while he stayed in Cuba. Ubilla may have also had some family with him. There's no indication that Salmon or others had family, but it's unlikely they'd include much personal info. Echeverz's sons were mentioned in communications simply because of the double tragedy of losing two at once while burdened to help Salmon lead salvage efforts.
