ENC28J60 Ethernet Board Accessory board used for connecting microcontrollers to the Ethernet network, RJ45 connector, SPI interface
Multiple SPI Ethernet and SD card reader (not shield) - Networking, Protocols, and Devices - Arduino Forum
Amazon.com: W5500 SPI to LAN Ethernet Network Module, Network Status Indicator LED, TCP IP STM32 SPI Interface 3.3V 5V for Arduino WIZ820io RC5 : Electronics
ESP32 Ethernet PHY chips supported by Arduino and ESP-IDF - PCB Artists
AX88796C - Low-Power SPI or Non-PCI Ethernet Controller | ASIX