We know that people in heaven remember their past lives from Revelation 6:10. Here John sees a vision of heaven wherein martyred saints cry for vengeance on those who caused them to be “slain” (v. 9). It would be hard to believe that God would allow people in heaven to have memories of people like this (cf. Rev. 18:20) and not memories of loved ones.
In addition, Abraham called upon the rich man in hell to “remember” Lazarus (Luke 16:25). If God allows people in hell to be tormented by memories of the people they knew during life, it would be difficult to believe He would not allow people in heaven to be comforted by the memories of their loved ones.
Finally, we know there is recognition in heaven since our bodies will be fashioned like unto the Lord’s resurrection body (Phil. 3:21), and He was only not recognizable to His loved ones when “their eyes were holden” (Luke 24:16). Additionally, Paul knew he’d be comforted by seeing the Thessalonians in heaven (I Thes. 2:19). Well, if our loved ones in heaven don’t remember us now, will they suddenly recognize and remember us when we ourselves arrive in heaven? It seems more natural to believe that our deceased friends, family, and spouses remember us now and already love us with the perfect love that we will have for one another throughout eternity. source