Ethernet Interface PCB layout
Don't split the grounds: use a solid ground plane instead. This elaborate splitting of grounds will only add extra ground impedance and worsen performance, noise immunity and emissions. Just don't.

The rest of the passive components should be SMD. I find it weird that you use a SMD magjack and then thru hole passives. If you're not used to SMD, pick 1206 size, they are very easy to work with.

The best place to put the passives is between the magjack and the ENC chip. It is a rather natural placement. If that doesn't fit, you can leave them where they are too (the transmission line stubs won't matter at 10Mbps).

There is no "AGND" in your schematic, nor ferrite bead between the grounds, so this is unclear. If that is what I think it is, according to the PCB layout, the ferrite bead will disconnect output transformer center tap from GND at HF and thus decrease performance, expect increase in common mode noise on the cable. So, no need for this ferrite bead.

The most important thing is to use a proper solid ground plane.