I have following type data for human family:
indvidual <- c("John", "Kris", "Peter", "King", "Marry", "Renu", "Kim", "Ken", "Lu")
Parent1 <- c( NA, NA, "John", "John", "John", NA, "Peter", NA, NA)
Parent2 <- c( NA, NA, "Kris", "Kris", "Renu", NA, "Lu", NA, NA)
X <- c( 2, 3, 2, 3, 4, 5, 1.5, 1, 1)
Y <- c( 3, 3, 2, 2, 2, 3, 1, 3, 2)
pchsize <- c( 4.5, 4.3, 9.2, 6.2, 3.2, 6.4, 2.1, 1.9, 8)
fillcol <- c( 8.5, 8.3, 1.2, 3.2, 8.2, 2.4, 2.6, 6.1, 3.2)
myd <- data.frame (indvidual, Parent1, Parent2, X, Y, pchsize,fillcol)
indvidual Parent1 Parent2 X Y pchsize fillcol
1 John <NA> <NA> 2.0 3 4.5 8.5
2 Kris <NA> <NA> 3.0 3 4.3 8.3
3 Peter John Kris 2.0 2 9.2 1.2
4 King John Kris 3.0 2 6.2 3.2
5 Marry John Renu 4.0 2 3.2 8.2
6 Renu <NA> <NA> 5.0 3 6.4 2.4
7 Kim Peter Lu 1.5 1 2.1 2.6
8 Ken <NA> <NA> 1.0 3 1.9 6.1
9 Lu <NA> <NA> 1.0 2 8.0 3.2
I want plot something like the following, individuals points are connected to parents (Preferably different line color to Parent1 and Parent2 listed). Also pch size and pch fill is scaled to other variables pchsize and fillcol. Thus plot outline is:

Here is my progress in ggplot2:
require(ggplot2)
ggplot(data=myd, aes(X, Y,fill = fillcol)) +
geom_point(aes(size = pchsize, fill = fillcol), pch = "O") +
geom_text(aes (label = indvidual, vjust=1.25))

Issues unsolved: connecting lines, making size of pch big and fill color at the sametime.