Network Map and Unknown Device

Computer Type: PC/Desktop
System Manufacturer/Model Number: Custom Built
OS: Windows 10 Pro x64, Windows 8.1 Pro x64, Windows 7 Ultimate x64 SP1,
CPU: INTEL i9-7920X LGA 2066
Motherboard: Gigabyte X299-WU8 F3
Memory: 64 GB (4 X 16 GB) G-Skill V Series DDR4 3200 Quad Channel
Graphics Card: EVGA GTX 1060 SC 3 GB
Sound Card: Realtek Onboard ALC1220
Monitor(s) Displays: 2 x Samsung S27E310
Screen Resolution: 1920x1080
Keyboard: Logitech G510s
Mouse: Logitech MX Master 2S
PSU: Seasonic X-1050
Case: Thermaltake Armor+
Cooling: Corsair H80i V2 Liquid AOI Cooler
Hard Drives: Samsung 2 x 970 EVO Plus 500 GB NVMe 1 x 6TB WD 6003FZBX SATA 1 x 6TB WD 60EFRX SATA 12 x 3TB WD 30EFRX SATA
Internet Speed: 200 Mb/s
Browser: EDGE (Dev, Canary, Beta), Chrome
Antivirus: ESET NOD32 13.1
Other Info: ASUS RT-AC68U router Malwarebytes 4.0.4

Computer Type: PC/Desktop
System Manufacturer/Model Number: HP ENVY 700-515xt CTO, with more cam, headers, and 4.11 gears.
OS: Windows 7 Pro SP1 x64
CPU: Intel Haswell i7-4770 3.4GHz
Motherboard: OEM Kaili2 (MSI MS-7826 v2.0)
Memory: G. SKILLS 32GB Ripjaws X Series DDR3 1600 SDRAM
Graphics Card: Integrated HD4600- upgrade coming!
Sound Card: Integrated...for now.
Monitor(s) Displays: Dell ST-2310 Digital
Screen Resolution: I like 1920x1080
Keyboard: Logitech and HP- USB.
Mouse: Logitech LS1 (Alltime favorite of mine!) and HP- both USB
PSU: 350w OEM (About to become a display in the aquarium!)
Case: ENVY OEM
Cooling: FANS
Hard Drives: C\:-Samsung 850PRO SSD-256gb, D:\-SG Barracuda 7200 HDD 1 TB (Storage)
Internet Speed: 65Mbps Down (min)/4.5Mbps UP- Charter Comm HS cable
Browser: Opera, at present. Love that Chromium horsepower!
Antivirus: avast! Internet Security 2015/MBAM