In Jainism, yes, a soul in heaven can be among and interact with other celestial beings (devas/devīs), but not as human-style family members.

Key points:

• Heavenly beings are separate births, not relatives in the earthly sense.
• They may meet, converse, and associate as devas/devīs in their celestial existence.
• But family bonds like husband, wife, parent, child are not the same as in human life; such relations are considered part of worldly attachment and karma.
• In Jain philosophy, all such heavenly relationships are temporary because even heaven is still within samsara, the cycle of birth and death.
• Moksha is beyond heaven, where the soul becomes liberated and has no worldly relationship at all.

So, in short: a person reborn in heaven may meet other celestial beings, but not as ordinary family members—rather as devas/devīs in a heavenly realm.