The "certain rich man", in context, is the covetous nation of 'Judah' (for that is to whom Jesus was speaking to, even all the way back in Luke 11:24, "a man", the "evil generation", "generation" (vs 29-32)), who had "five brothers" (Lk. 16:28) by the same mother "Leah", who were Reuben, Simeon, Levi, Issachar, and Zebulun (the other tribes, nations). The names Abraham (father of nations; Gn. 17:5) and Lazarus (NT for OT Eliezar (which means 'the poor', not a single person, but many, as the rich man represents many); Gn. 15:2), are used as symbolic names, for what they mean. Jesus, in context, is speaking to "Pharisees" (Lk. 16:14-15), and Jesus always spoke to them in "parables" (Mt. 13:34), and this in fulfillment of the Psalms (Ps. 78:2). Parables in scripture can contain proper names, but used for what their name means (Nm. 24:3,15 in example). The Parable, comes in a series of parables, see Lk. 14:7 (guests), Lk. 14:16 (dinner and place), Lk. 15:3 (100 Sheep, lose one), Lk. 15:8 (Woman and coin), Lk. 15:11 (Prodigals), Lk. 16:1 (Rich steward) and the pharisees, and others were the covetous ones, to whom Jesus was addressing. The remainder of the symbols in the parable and their meaning, are simply identified by other places in the scripture, to which Jesus or others already spake of. They had failed to take of the wealth that God had given them, to the lost, and poor, and were hoarding it to themselves, despising those with nothing, around them. Do people really think that the Bible, or Jesus for that matter, teaches that he can send the dead to give warning to the living? God forbade that in the OT, and even King Saul was condemned for believing such.